//-----------------------------------------------------------------------
// Copyright (C) Motorwebs Corporation. All rights reserved.
//-----------------------------------------------------------------------
// (c) Copyright Microsoft Corporation.
// This source is subject to the Microsoft Permissive License.
// See http://www.microsoft.com/resources/sharedsource/licensingbasics/sharedsourcelicenses.mspx.
// All other rights reserved.

Type.registerNamespace('Motorwebs.UI');

Motorwebs.UI.BoxSide = function() {
  /// <summary>
  /// The BoxSide enumeration describes the sides of a DOM element
  /// </summary>
  /// <field name="Top" type="Number" integer="true" static="true" />
  /// <field name="Right" type="Number" integer="true" static="true" />
  /// <field name="Bottom" type="Number" integer="true" static="true" />
  /// <field name="Left" type="Number" integer="true" static="true" />
}

Motorwebs.UI.BoxSide.prototype = {
  Top: 0,
  Right: 1,
  Bottom: 2,
  Left: 3
}

Motorwebs.UI.BoxSide.registerEnum("Motorwebs.UI.BoxSide", false);

Motorwebs.UI._Common = function() { }
Motorwebs.UI._Common.prototype = {

    // The order of these lookup tables is directly linked to the BoxSide enum defined above
    _borderStyleNames: ["borderTopStyle", "borderRightStyle", "borderBottomStyle", "borderLeftStyle"],
    _borderWidthNames: ["borderTopWidth", "borderRightWidth", "borderBottomWidth", "borderLeftWidth"],
    _paddingWidthNames: ["paddingTop", "paddingRight", "paddingBottom", "paddingLeft"],
    _marginWidthNames: ["marginTop", "marginRight", "marginBottom", "marginLeft"],

    getCurrentStyle: function(element, attribute, defaultValue) {
        /// <summary>
        /// getCurrentStyle is used to compute the value of a style attribute on an
        /// element that is currently being displayed.  This is especially useful for scenarios where
        /// several CSS classes and style attributes are merged, or when you need information about the
        /// size of an element (such as its padding or margins) that is not exposed in any other fashion.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// Live DOM element to check style of
        /// </param>
        /// <param name="attribute" type="String">
        /// The style attribute's name is expected to be in a camel-cased form that you would use when
        /// accessing a JavaScript property instead of the hyphenated form you would use in a CSS
        /// stylesheet (i.e. it should be "backgroundColor" and not "background-color").
        /// </param>
        /// <param name="defaultValue" type="Object" mayBeNull="true" optional="true">
        /// In the event of a problem (i.e. a null element or an attribute that cannot be found) we
        /// return this object (or null if none if not specified).
        /// </param>
        /// <returns type="Object">
        /// Current style of the element's attribute
        /// </returns>

        var currentValue = null;
        if (element) {
            if (element.currentStyle) {
                currentValue = element.currentStyle[attribute];
            } else if (document.defaultView && document.defaultView.getComputedStyle) {
                var style = document.defaultView.getComputedStyle(element, null);
                if (style) {
                    currentValue = style[attribute];
                }
            }

            if (!currentValue && element.style.getPropertyValue) {
                currentValue = element.style.getPropertyValue(attribute);
            }
            else if (!currentValue && element.style.getAttribute) {
                currentValue = element.style.getAttribute(attribute);
            }
        }

        if ((!currentValue || currentValue == "" || typeof (currentValue) === 'undefined')) {
            if (typeof (defaultValue) != 'undefined') {
                currentValue = defaultValue;
            }
            else {
                currentValue = null;
            }
        }
        return currentValue;
    },

    getInheritedBackgroundColor: function(element) {
        /// <summary>
        /// CommonScripts.getInheritedBackgroundColor provides the ability to get the displayed
        /// background-color of an element.  In most cases calling CommonScripts.getCurrentStyle
        /// won't do the job because it will return "transparent" unless the element has been given a
        /// specific background color.  This function will walk up the element's parents until it finds
        /// a non-transparent color.  If we get all the way to the top of the document or have any other
        /// problem finding a color, we will return the default value '#FFFFFF'.  This function is
        /// especially important when we're using opacity in IE (because ClearType will make text look
        /// horrendous if you fade it with a transparent background color).
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// Live DOM element to get the background color of
        /// </param>
        /// <returns type="String">
        /// Background color of the element
        /// </returns>

        if (!element) return '#FFFFFF';
        var background = this.getCurrentStyle(element, 'backgroundColor');
        try {
            while (!background || background == '' || background == 'transparent' || background == 'rgba(0, 0, 0, 0)') {
                element = element.parentNode;
                if (!element) {
                    background = '#FFFFFF';
                } else {
                    background = this.getCurrentStyle(element, 'backgroundColor');
                }
            }
        } catch (ex) {
            background = '#FFFFFF';
        }
        return background;
    },

    getLocation: function(element) {
        /// <summary>Gets the coordinates of a DOM element.</summary>
        /// <param name="element" domElement="true"/>
        /// <returns type="Sys.UI.Point">
        ///   A Point object with two fields, x and y, which contain the pixel coordinates of the element.
        /// </returns>

        // workaround for an issue in getLocation where it will compute the location of the document element.
        // this will return an offset if scrolled.
        //
        if (element === document.documentElement) {
            return new Sys.UI.Point(0, 0);
        }

        // Workaround for IE6 bug in getLocation (also required patching getBounds - remove that fix when this is removed)
        if (Sys.Browser.agent == Sys.Browser.InternetExplorer && Sys.Browser.version < 7) {
            if (element.window === element || element.nodeType === 9 || !element.getClientRects || !element.getBoundingClientRect) return new Sys.UI.Point(0, 0);

            // Get the first bounding rectangle in screen coordinates
            var screenRects = element.getClientRects();
            if (!screenRects || !screenRects.length) {
                return new Sys.UI.Point(0, 0);
            }
            var first = screenRects[0];

            // Delta between client coords and screen coords
            var dLeft = 0;
            var dTop = 0;

            var inFrame = false;
            try {
                inFrame = element.ownerDocument.parentWindow.frameElement;
            } catch (ex) {
                // If accessing the frameElement fails, a frame is probably in a different
                // domain than its parent - and we still want to do the calculation below
                inFrame = true;
            }

            // If we're in a frame, get client coordinates too so we can compute the delta
            if (inFrame) {
                // Get the bounding rectangle in client coords
                var clientRect = element.getBoundingClientRect();
                if (!clientRect) {
                    return new Sys.UI.Point(0, 0);
                }

                // Find the minima in screen coords
                var minLeft = first.left;
                var minTop = first.top;
                for (var i = 1; i < screenRects.length; i++) {
                    var r = screenRects[i];
                    if (r.left < minLeft) {
                        minLeft = r.left;
                    }
                    if (r.top < minTop) {
                        minTop = r.top;
                    }
                }

                // Compute the delta between screen and client coords
                dLeft = minLeft - clientRect.left;
                dTop = minTop - clientRect.top;
            }

            // Subtract 2px, the border of the viewport (It can be changed in IE6 by applying a border style to the HTML element,
            // but this is not supported by ASP.NET AJAX, and it cannot be changed in IE7.), and also subtract the delta between
            // screen coords and client coords
            var ownerDocument = element.document.documentElement;
            return new Sys.UI.Point(first.left - 2 - dLeft + ownerDocument.scrollLeft, first.top - 2 - dTop + ownerDocument.scrollTop);
        }

        return Sys.UI.DomElement.getLocation(element);
    },

    setLocation: function(element, point) {
        /// <summary>
        /// Sets the current location for an element.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="point" type="Object">
        /// Point object (of the form {x,y})
        /// </param>
        /// <remarks>
        /// This method does not attempt to set the positioning mode of an element.
        /// The position is relative from the elements nearest position:relative or
        /// position:absolute element.
        /// </remarks>
        Sys.UI.DomElement.setLocation(element, point.x, point.y);
    },

    getContentSize: function(element) {
        /// <summary>
        /// Gets the "content-box" size of an element.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <returns type="Object">
        /// Size of the element (in the form {width,height})
        /// </returns>
        /// <remarks>
        /// The "content-box" is the size of the content area *inside* of the borders and
        /// padding of an element. The "content-box" size does not include the margins around
        /// the element.
        /// </remarks>

        if (!element) {
            throw Error.argumentNull('element');
        }
        var size = this.getSize(element);
        var borderBox = this.getBorderBox(element);
        var paddingBox = this.getPaddingBox(element);
        return {
            width: size.width - borderBox.horizontal - paddingBox.horizontal,
            height: size.height - borderBox.vertical - paddingBox.vertical
        }
    },

    getSize: function(element) {
        /// <summary>
        /// Gets the "border-box" size of an element.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <returns type="Object">
        /// Size of the element (in the form {width,height})
        /// </returns>
        /// <remarks>
        /// The "border-box" is the size of the content area *outside* of the borders and
        /// padding of an element.  The "border-box" size does not include the margins around
        /// the element.
        /// </remarks>

        if (!element) {
            throw Error.argumentNull('element');
        }
        return {
            width: element.offsetWidth,
            height: element.offsetHeight
        };
    },

    setContentSize: function(element, size) {
        /// <summary>
        /// Sets the "content-box" size of an element.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="size" type="Object">
        /// Size of the element (in the form {width,height})
        /// </param>
        /// <remarks>
        /// The "content-box" is the size of the content area *inside* of the borders and
        /// padding of an element. The "content-box" size does not include the margins around
        /// the element.
        /// </remarks>

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (!size) {
            throw Error.argumentNull('size');
        }
        // FF respects -moz-box-sizing css extension, so adjust the box size for the border-box
        if (this.getCurrentStyle(element, 'MozBoxSizing') == 'border-box' || this.getCurrentStyle(element, 'BoxSizing') == 'border-box') {
            var borderBox = this.getBorderBox(element);
            var paddingBox = this.getPaddingBox(element);
            size = {
                width: size.width + borderBox.horizontal + paddingBox.horizontal,
                height: size.height + borderBox.vertical + paddingBox.vertical
            };
        }
        element.style.width = size.width.toString() + 'px';
        element.style.height = size.height.toString() + 'px';
    },

    setSize: function(element, size) {
        /// <summary>
        /// Sets the "border-box" size of an element.
        /// </summary>
        /// <remarks>
        /// The "border-box" is the size of the content area *outside* of the borders and 
        /// padding of an element.  The "border-box" size does not include the margins around
        /// the element.
        /// </remarks>
        /// <param name="element" type="Sys.UI.DomElement">DOM element</param>
        /// <param name="size" type="Object">Size of the element (in the form {width,height})</param>
        /// <returns />

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (!size) {
            throw Error.argumentNull('size');
        }
        var borderBox = this.getBorderBox(element);
        var paddingBox = this.getPaddingBox(element);
        var contentSize = {
            width: size.width - borderBox.horizontal - paddingBox.horizontal,
            height: size.height - borderBox.vertical - paddingBox.vertical
        };
        this.setContentSize(element, contentSize);
    },

    getBounds: function(element) {
        /// <summary>Gets the coordinates, width and height of an element.</summary>
        /// <param name="element" domElement="true"/>
        /// <returns type="Sys.UI.Bounds">
        ///   A Bounds object with four fields, x, y, width and height, which contain the pixel coordinates,
        ///   width and height of the element.
        /// </returns>
        /// <remarks>
        ///   Use the CommonScripts version of getLocation to handle the workaround for IE6.  We can
        ///   remove the below implementation and just call Sys.UI.DomElement.getBounds when the other bug
        ///   is fixed.
        /// </remarks>

        var offset = $common.getLocation(element);
        return new Sys.UI.Bounds(offset.x, offset.y, element.offsetWidth || 0, element.offsetHeight || 0);
    },

    setBounds: function(element, bounds) {
        /// <summary>
        /// Sets the "border-box" bounds of an element
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="bounds" type="Object">
        /// Bounds of the element (of the form {x,y,width,height})
        /// </param>
        /// <remarks>
        /// The "border-box" is the size of the content area *outside* of the borders and
        /// padding of an element.  The "border-box" size does not include the margins around
        /// the element.
        /// </remarks>

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (!bounds) {
            throw Error.argumentNull('bounds');
        }
        this.setSize(element, bounds);
        $common.setLocation(element, bounds);
    },

    getClientBounds: function() {
        /// <summary>
        /// Gets the width and height of the browser client window (excluding scrollbars)
        /// </summary>
        /// <returns type="Sys.UI.Bounds">
        /// Browser's client width and height
        /// </returns>

        var clientWidth;
        var clientHeight;
        switch (Sys.Browser.agent) {
            case Sys.Browser.InternetExplorer:
                clientWidth = document.documentElement.clientWidth;
                clientHeight = document.documentElement.clientHeight;
                break;
            case Sys.Browser.Safari:
                clientWidth = window.innerWidth;
                clientHeight = window.innerHeight;
                break;
            case Sys.Browser.Opera:
                clientWidth = Math.min(window.innerWidth, document.body.clientWidth);
                clientHeight = Math.min(window.innerHeight, document.body.clientHeight);
                break;
            default:  // Sys.Browser.Firefox, etc.
                clientWidth = Math.min(window.innerWidth, document.documentElement.clientWidth);
                clientHeight = Math.min(window.innerHeight, document.documentElement.clientHeight);
                break;
        }

        //var scrollLeft = (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
        //var scrollTop = (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);

        return new Sys.UI.Bounds(0, 0, clientWidth, clientHeight);
    },

    getMarginBox: function(element) {
        /// <summary>
        /// Gets the entire margin box sizes.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <returns type="Object">
        /// Element's margin box sizes (of the form {top,left,bottom,right,horizontal,vertical})
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        var box = {
            top: this.getMargin(element, Motorwebs.UI.BoxSide.Top),
            right: this.getMargin(element, Motorwebs.UI.BoxSide.Right),
            bottom: this.getMargin(element, Motorwebs.UI.BoxSide.Bottom),
            left: this.getMargin(element, Motorwebs.UI.BoxSide.Left)
        };
        box.horizontal = box.left + box.right;
        box.vertical = box.top + box.bottom;
        return box;
    },

    getBorderBox: function(element) {
        /// <summary>
        /// Gets the entire border box sizes.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <returns type="Object">
        /// Element's border box sizes (of the form {top,left,bottom,right,horizontal,vertical})
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        var box = {
            top: this.getBorderWidth(element, Motorwebs.UI.BoxSide.Top),
            right: this.getBorderWidth(element, Motorwebs.UI.BoxSide.Right),
            bottom: this.getBorderWidth(element, Motorwebs.UI.BoxSide.Bottom),
            left: this.getBorderWidth(element, Motorwebs.UI.BoxSide.Left)
        };
        box.horizontal = box.left + box.right;
        box.vertical = box.top + box.bottom;
        return box;
    },

    getPaddingBox: function(element) {
        /// <summary>
        /// Gets the entire padding box sizes.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <returns type="Object">
        /// Element's padding box sizes (of the form {top,left,bottom,right,horizontal,vertical})
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        var box = {
            top: this.getPadding(element, Motorwebs.UI.BoxSide.Top),
            right: this.getPadding(element, Motorwebs.UI.BoxSide.Right),
            bottom: this.getPadding(element, Motorwebs.UI.BoxSide.Bottom),
            left: this.getPadding(element, Motorwebs.UI.BoxSide.Left)
        };
        box.horizontal = box.left + box.right;
        box.vertical = box.top + box.bottom;
        return box;
    },

    isBorderVisible: function(element, boxSide) {
        /// <summary>
        /// Gets whether the current border style for an element on a specific boxSide is not 'none'.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="boxSide" type="Motorwebs.UI.BoxSide">
        /// Side of the element
        /// </param>
        /// <returns type="Boolean">
        /// Whether the current border style for an element on a specific boxSide is not 'none'.
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (boxSide < Motorwebs.UI.BoxSide.Top || boxSide > Motorwebs.UI.BoxSide.Left) {
            throw Error.argumentOutOfRange(String.format(Sys.Res.enumInvalidValue, boxSide, 'Motorwebs.UI.BoxSide'));
        }
        var styleName = this._borderStyleNames[boxSide];
        var styleValue = this.getCurrentStyle(element, styleName);
        return styleValue != "none";
    },

    getMargin: function(element, boxSide) {
        /// <summary>
        /// Gets the margin thickness of an element on a specific boxSide.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="boxSide" type="Motorwebs.UI.BoxSide">
        /// Side of the element
        /// </param>
        /// <returns type="Number" integer="true">
        /// Margin thickness on the element's specified side
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (boxSide < Motorwebs.UI.BoxSide.Top || boxSide > Motorwebs.UI.BoxSide.Left) {
            throw Error.argumentOutOfRange(String.format(Sys.Res.enumInvalidValue, boxSide, 'Motorwebs.UI.BoxSide'));
        }
        var styleName = this._marginWidthNames[boxSide];
        var styleValue = this.getCurrentStyle(element, styleName);
        try { return this.parsePadding(styleValue); } catch (ex) { return 0; }
    },

    getBorderWidth: function(element, boxSide) {
        /// <summary>
        /// Gets the border thickness of an element on a specific boxSide.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="boxSide" type="Motorwebs.UI.BoxSide">
        /// Side of the element
        /// </param>
        /// <returns type="Number" integer="true">
        /// Border thickness on the element's specified side
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (boxSide < Motorwebs.UI.BoxSide.Top || boxSide > Motorwebs.UI.BoxSide.Left) {
            throw Error.argumentOutOfRange(String.format(Sys.Res.enumInvalidValue, boxSide, 'Motorwebs.UI.BoxSide'));
        }
        if (!this.isBorderVisible(element, boxSide)) {
            return 0;
        }
        var styleName = this._borderWidthNames[boxSide];
        var styleValue = this.getCurrentStyle(element, styleName);
        return this.parseBorderWidth(styleValue);
    },

    getPadding: function(element, boxSide) {
        /// <summary>
        /// Gets the padding thickness of an element on a specific boxSide.
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// DOM element
        /// </param>
        /// <param name="boxSide" type="Motorwebs.UI.BoxSide">
        /// Side of the element
        /// </param>
        /// <returns type="Number" integer="true">
        /// Padding on the element's specified side
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }
        if (boxSide < Motorwebs.UI.BoxSide.Top || boxSide > Motorwebs.UI.BoxSide.Left) {
            throw Error.argumentOutOfRange(String.format(Sys.Res.enumInvalidValue, boxSide, 'Motorwebs.UI.BoxSide'));
        }
        var styleName = this._paddingWidthNames[boxSide];
        var styleValue = this.getCurrentStyle(element, styleName);
        return this.parsePadding(styleValue);
    },

    parseBorderWidth: function(borderWidth) {
        /// <summary>
        /// Parses a border-width string into a pixel size
        /// </summary>
        /// <param name="borderWidth" type="String" mayBeNull="true">
        /// Type of border ('thin','medium','thick','inherit',px unit,null,'')
        /// </param>
        /// <returns type="Number" integer="true">
        /// Number of pixels in the border-width
        /// </returns>
        if (!this._borderThicknesses) {

            // Populate the borderThicknesses lookup table
            var borderThicknesses = {};
            var div0 = document.createElement('div');
            div0.style.visibility = 'hidden';
            div0.style.position = 'absolute';
            div0.style.fontSize = '1px';
            document.body.appendChild(div0)
            var div1 = document.createElement('div');
            div1.style.height = '0px';
            div1.style.overflow = 'hidden';
            div0.appendChild(div1);
            var base = div0.offsetHeight;
            div1.style.borderTop = 'solid black';
            div1.style.borderTopWidth = 'thin';
            borderThicknesses['thin'] = div0.offsetHeight - base;
            div1.style.borderTopWidth = 'medium';
            borderThicknesses['medium'] = div0.offsetHeight - base;
            div1.style.borderTopWidth = 'thick';
            borderThicknesses['thick'] = div0.offsetHeight - base;
            div0.removeChild(div1);
            document.body.removeChild(div0);
            this._borderThicknesses = borderThicknesses;
        }

        if (borderWidth) {
            switch (borderWidth) {
                case 'thin':
                case 'medium':
                case 'thick':
                    return this._borderThicknesses[borderWidth];
                case 'inherit':
                    return 0;
            }
            var unit = this.parseUnit(borderWidth);
            Sys.Debug.assert(unit.type == 'px', String.format(Motorwebs.UI.Resources.Common_InvalidBorderWidthUnit, unit.type));
            return unit.size;
        }
        return 0;
    },

    parsePadding: function(padding) {
        /// <summary>
        /// Parses a padding string into a pixel size
        /// </summary>
        /// <param name="padding" type="String" mayBeNull="true">
        /// Padding to parse ('inherit',px unit,null,'')
        /// </param>
        /// <returns type="Number" integer="true">
        /// Number of pixels in the padding
        /// </returns>

        if (padding) {
            if (padding == 'inherit') {
                return 0;
            }
            var unit = this.parseUnit(padding);
            Sys.Debug.assert(unit.type == 'px', String.format(Motorwebs.UI.Resources.Common_InvalidPaddingUnit, unit.type));
            return unit.size;
        }
        return 0;
    },

    parseUnit: function(value) {
        /// <summary>
        /// Parses a unit string into a unit object
        /// </summary>
        /// <param name="value" type="String" mayBeNull="true">
        /// Value to parse (of the form px unit,% unit,em unit,...)
        /// </param>
        /// <returns type="Object">
        /// Parsed unit (of the form {size,type})
        /// </returns>

        if (!value) {
            throw Error.argumentNull('value');
        }

        value = value.trim().toLowerCase();
        var l = value.length;
        var s = -1;
        for (var i = 0; i < l; i++) {
            var ch = value.substr(i, 1);
            if ((ch < '0' || ch > '9') && ch != '-' && ch != '.' && ch != ',') {
                break;
            }
            s = i;
        }
        if (s == -1) {
            throw Error.create(Motorwebs.UI.Resources.Common_UnitHasNoDigits);
        }
        var type;
        var size;
        if (s < (l - 1)) {
            type = value.substring(s + 1).trim();
        } else {
            type = 'px';
        }
        size = parseFloat(value.substr(0, s + 1));
        if (type == 'px') {
            size = Math.floor(size);
        }
        return {
            size: size,
            type: type
        };
    },

    getElementOpacity: function(element) {
        /// <summary>
        /// Get the element's opacity
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// Element
        /// </param>
        /// <returns type="Number">
        /// Opacity of the element
        /// </returns>

        if (!element) {
            throw Error.argumentNull('element');
        }

        var hasOpacity = false;
        var opacity;

        if (element.filters) {
            var filters = element.filters;
            if (filters.length !== 0) {
                var alphaFilter = filters['DXImageTransform.Microsoft.Alpha'];
                if (alphaFilter) {
                    opacity = alphaFilter.opacity / 100.0;
                    hasOpacity = true;
                }
            }
        }
        else {
            opacity = this.getCurrentStyle(element, 'opacity', 1);
            hasOpacity = true;
        }

        if (hasOpacity === false) {
            return 1.0;
        }
        return parseFloat(opacity);
    },

    setElementOpacity: function(element, value) {
        /// <summary>
        /// Set the element's opacity
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// Element
        /// </param>
        /// <param name="value" type="Number">
        /// Opacity of the element
        /// </param>

        if (!element) {
            throw Error.argumentNull('element');
        }

        if (element.filters) {
            var filters = element.filters;
            var createFilter = true;
            if (filters.length !== 0) {
                var alphaFilter = filters['DXImageTransform.Microsoft.Alpha'];
                if (alphaFilter) {
                    createFilter = false;
                    alphaFilter.opacity = value * 100;
                }
            }
            if (createFilter) {
                element.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + (value * 100) + ')';
            }
        }
        else {
            element.style.opacity = value;
        }
    },

    getVisible: function(element) {
        /// <summary>
        /// Check if an element is visible
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// Element
        /// </param>
        /// <returns type="Boolean" mayBeNull="false">
        /// True if the element is visible, false otherwise
        /// </returns>

        // Note: reference to CommonScripts must be left intact (i.e. don't
        // replace with 'this') because this function will be aliased

        return (element &&
                ("none" != $common.getCurrentStyle(element, "display")) &&
                ("hidden" != $common.getCurrentStyle(element, "visibility")));
    },

    setVisible: function(element, value) {
        /// <summary>
        /// Check if an element is visible
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement" domElement="true">
        /// Element
        /// </param>
        /// <param name="value" type="Boolean" mayBeNull="false">
        /// True to make the element visible, false to hide it
        /// </param>

        // Note: reference to CommonScripts must be left intact (i.e. don't
        // replace with 'this') because this function will be aliased

        if (element && value != $common.getVisible(element)) {
            if (value) {
                if (element.style.removeAttribute) {
                    element.style.removeAttribute("display");
                } else {
                    element.style.removeProperty("display");
                }
            } else {
                element.style.display = 'none';
            }
            element.style.visibility = value ? 'visible' : 'hidden';
        }
    },

    resolveFunction: function(value) {
        /// <summary>
        /// Returns a function reference that corresponds to the provided value
        /// </summary>
        /// <param name="value" type="Object">
        /// The value can either be a Function, the name of a function (that can be found using window['name']),
        /// or an expression that evaluates to a function.
        /// </param>
        /// <returns type="Function">
        /// Reference to the function, or null if not found
        /// </returns>

        if (value) {
            if (value instanceof Function) {
                return value;
            } else if (String.isInstanceOfType(value) && value.length > 0) {
                var func;
                if ((func = window[value]) instanceof Function) {
                    return func;
                } else if ((func = eval(value)) instanceof Function) {
                    return func;
                }
            }
        }
        return null;
    },

    addCssClasses: function(element, classNames) {
        /// <summary>
        /// Adds multiple css classes to a DomElement
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to modify</param>
        /// <param name="classNames" type="Array">The class names to add</param>

        for (var i = 0; i < classNames.length; i++) {
            Sys.UI.DomElement.addCssClass(element, classNames[i]);
        }
    },

    removeCssClasses: function(element, classNames) {
        /// <summary>
        /// Removes multiple css classes to a DomElement
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to modify</param>
        /// <param name="classNames" type="Array">The class names to remove</param>

        for (var i = 0; i < classNames.length; i++) {
            Sys.UI.DomElement.removeCssClass(element, classNames[i]);
        }
    },

    setStyle: function(element, style) {
        /// <summary>
        /// Sets the style of the element using the supplied style template object
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to modify</param>
        /// <param name="style" type="Object">The template</param>

        $common.applyProperties(element.style, style);
    },

    removeHandlers: function(element, events) {
        /// <summary>
        /// Removes a set of event handlers from an element
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to modify</param>
        /// <param name="events" type="Object">The template object that contains event names and delegates</param>
        /// <remarks>
        /// This is NOT the same as $clearHandlers which removes all delegates from a DomElement.  This rather removes select delegates 
        /// from a specified element and has a matching signature as $addHandlers
        /// </remarks>
        for (var name in events) {
            $removeHandler(element, name, events[name]);
        }
    },

    overlaps: function(r1, r2) {
        /// <summary>
        /// Determine if two rectangles overlap
        /// </summary>
        /// <param name="r1" type="Object">
        /// Rectangle
        /// </param>
        /// <param name="r2" type="Object">
        /// Rectangle
        /// </param>
        /// <returns type="Boolean">
        /// True if the rectangles overlap, false otherwise
        /// </returns>

        return r1.x < (r2.x + r2.width)
                && r2.x < (r1.x + r1.width)
                && r1.y < (r2.y + r2.height)
                && r2.y < (r1.y + r1.height);
    },

    containsPoint: function(rect, x, y) {
        /// <summary>
        /// Tests whether a point (x,y) is contained within a rectangle
        /// </summary>
        /// <param name="rect" type="Object">The rectangle</param>
        /// <param name="x" type="Number">The x coordinate of the point</param>
        /// <param name="y" type="Number">The y coordinate of the point</param>

        return x >= rect.x && x < (rect.x + rect.width) && y >= rect.y && y < (rect.y + rect.height);
    },

    isKeyDigit: function(keyCode) {
        /// <summary>
        /// Gets whether the supplied key-code is a digit
        /// </summary>
        /// <param name="keyCode" type="Number" integer="true">The key code of the event (from Sys.UI.DomEvent)</param>
        /// <returns type="Boolean" />

        return (0x30 <= keyCode && keyCode <= 0x39);
    },

    isKeyNavigation: function(keyCode) {
        /// <summary>
        /// Gets whether the supplied key-code is a navigation key
        /// </summary>
        /// <param name="keyCode" type="Number" integer="true">The key code of the event (from Sys.UI.DomEvent)</param>
        /// <returns type="Boolean" />

        return (Sys.UI.Key.left <= keyCode && keyCode <= Sys.UI.Key.down);
    },

    padLeft: function(text, size, ch, truncate) {
        /// <summary>
        /// Pads the left hand side of the supplied text with the specified pad character up to the requested size
        /// </summary>
        /// <param name="text" type="String">The text to pad</param>
        /// <param name="size" type="Number" integer="true" optional="true">The size to pad the text (default is 2)</param>
        /// <param name="ch" type="String" optional="true">The single character to use as the pad character (default is ' ')</param>
        /// <param name="truncate" type="Boolean" optional="true">Whether to truncate the text to size (default is false)</param>

        return $common._pad(text, size || 2, ch || ' ', 'l', truncate || false);
    },

    padRight: function(text, size, ch, truncate) {
        /// <summary>
        /// Pads the right hand side of the supplied text with the specified pad character up to the requested size
        /// </summary>
        /// <param name="text" type="String">The text to pad</param>
        /// <param name="size" type="Number" integer="true" optional="true">The size to pad the text (default is 2)</param>
        /// <param name="ch" type="String" optional="true">The single character to use as the pad character (default is ' ')</param>
        /// <param name="truncate" type="Boolean" optional="true">Whether to truncate the text to size (default is false)</param>

        return $common._pad(text, size || 2, ch || ' ', 'r', truncate || false);
    },

    _pad: function(text, size, ch, side, truncate) {
        /// <summary>
        /// Pads supplied text with the specified pad character up to the requested size
        /// </summary>
        /// <param name="text" type="String">The text to pad</param>
        /// <param name="size" type="Number" integer="true">The size to pad the text</param>
        /// <param name="ch" type="String">The single character to use as the pad character</param>
        /// <param name="side" type="String">Either 'l' or 'r' to siginfy whether to pad the Left or Right side respectively</param>
        /// <param name="truncate" type="Boolean">Whether to truncate the text to size</param>

        text = text.toString();
        var length = text.length;
        var builder = new Sys.StringBuilder();
        if (side == 'r') {
            builder.append(text);
        }
        while (length < size) {
            builder.append(ch);
            length++;
        }
        if (side == 'l') {
            builder.append(text);
        }
        var result = builder.toString();
        if (truncate && result.length > size) {
            if (side == 'l') {
                result = result.substr(result.length - size, size);
            } else {
                result = result.substr(0, size);
            }
        }
        return result;
    },

    __DOMEvents: {
        focusin: { eventGroup: "UIEvents", init: function(e, p) { e.initUIEvent("focusin", true, false, window, 1); } },
        focusout: { eventGroup: "UIEvents", init: function(e, p) { e.initUIEvent("focusout", true, false, window, 1); } },
        activate: { eventGroup: "UIEvents", init: function(e, p) { e.initUIEvent("activate", true, true, window, 1); } },
        focus: { eventGroup: "UIEvents", init: function(e, p) { e.initUIEvent("focus", false, false, window, 1); } },
        blur: { eventGroup: "UIEvents", init: function(e, p) { e.initUIEvent("blur", false, false, window, 1); } },
        click: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("click", true, true, window, 1, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        dblclick: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("click", true, true, window, 2, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        mousedown: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("mousedown", true, true, window, 1, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        mouseup: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("mouseup", true, true, window, 1, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        mouseover: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("mouseover", true, true, window, 1, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        mousemove: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("mousemove", true, true, window, 1, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        mouseout: { eventGroup: "MouseEvents", init: function(e, p) { e.initMouseEvent("mousemove", true, true, window, 1, p.screenX || 0, p.screenY || 0, p.clientX || 0, p.clientY || 0, p.ctrlKey || false, p.altKey || false, p.shiftKey || false, p.metaKey || false, p.button || 0, p.relatedTarget || null); } },
        load: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("load", false, false); } },
        unload: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("unload", false, false); } },
        select: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("select", true, false); } },
        change: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("change", true, false); } },
        submit: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("submit", true, true); } },
        reset: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("reset", true, false); } },
        resize: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("resize", true, false); } },
        scroll: { eventGroup: "HTMLEvents", init: function(e, p) { e.initEvent("scroll", true, false); } }
    },

    tryFireRawEvent: function(element, rawEvent) {
        /// <summary>
        /// Attempts to fire a raw DOM event on an element
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to fire the event</param>
        /// <param name="rawEvent" type="Object">The raw DOM event object to fire. Must not be Sys.UI.DomEvent</param>
        /// <returns type="Boolean">True if the event was successfully fired, otherwise false</returns>

        try {
            if (element.fireEvent) {
                element.fireEvent("on" + rawEvent.type, rawEvent);
                return true;
            } else if (element.dispatchEvent) {
                element.dispatchEvent(rawEvent);
                return true;
            }
        } catch (e) {
        }
        return false;
    },

    tryFireEvent: function(element, eventName, properties) {
        /// <summary>
        /// Attempts to fire a DOM event on an element
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to fire the event</param>
        /// <param name="eventName" type="String">The name of the event to fire (without an 'on' prefix)</param>
        /// <param name="properties" type="Object">Properties to add to the event</param>
        /// <returns type="Boolean">True if the event was successfully fired, otherwise false</returns>

        try {
            if (document.createEventObject) {
                var e = document.createEventObject();
                $common.applyProperties(e, properties || {});
                element.fireEvent("on" + eventName, e);
                return true;
            } else if (document.createEvent) {
                var def = $common.__DOMEvents[eventName];
                if (def) {
                    var e = document.createEvent(def.eventGroup);
                    def.init(e, properties || {});
                    element.dispatchEvent(e);
                    return true;
                }
            }
        } catch (e) {
        }
        return false;
    },

    wrapElement: function(innerElement, newOuterElement, newInnerParentElement) {
        /// <summary>
        /// Wraps an inner element with a new outer element at the same DOM location as the inner element
        /// </summary>
        /// <param name="innerElement" type="Sys.UI.DomElement">The element to be wrapped</param>
        /// <param name="newOuterElement" type="Sys.UI.DomElement">The new parent for the element</param>
        /// <returns />

        var parent = innerElement.parentNode;
        parent.replaceChild(newOuterElement, innerElement);
        (newInnerParentElement || newOuterElement).appendChild(innerElement);
    },

    unwrapElement: function(innerElement, oldOuterElement) {
        /// <summary>
        /// Unwraps an inner element from an outer element at the same DOM location as the outer element
        /// </summary>
        /// <param name="innerElement" type="Sys.UI.DomElement">The element to be wrapped</param>
        /// <param name="newOuterElement" type="Sys.UI.DomElement">The new parent for the element</param>
        /// <returns />

        var parent = oldOuterElement.parentNode;
        if (parent != null) {
            $common.removeElement(innerElement);
            parent.replaceChild(innerElement, oldOuterElement);
        }
    },

    removeElement: function(element) {
        /// <summary>
        /// Removes an element from the DOM tree
        /// </summary>
        /// <param name="element" type="Sys.UI.DomElement">The element to be removed</param>
        /// <returns />

        var parent = element.parentNode;
        if (parent != null) {
            parent.removeChild(element);
        }
    },

    applyProperties: function(target, properties) {
        /// <summary>
        /// Quick utility method to copy properties from a template object to a target object
        /// </summary>
        /// <param name="target" type="Object">The object to apply to</param>
        /// <param name="properties" type="Object">The template to copy values from</param>

        for (var p in properties) {
            var pv = properties[p];
            if (pv != null && Object.getType(pv) === Object) {
                var tv = target[p];
                $common.applyProperties(tv, pv);
            } else {
                target[p] = pv;
            }
        }
    },

    parseNumber: function(num) {
        num = num.toString().replace(/\$/, '').replace(/\%/, '').replace(/,/, '');
        return isNaN(parseFloat(num)) ? 0 : parseFloat(num);
    },

    isNotEmpty: function(el) {
        var str = el.value;
        var re = /.+/;
        if (!str.match(re) || ((el.title + ':') == el.value)) {
            alert("Please fill in the required " + el.title + " field.");
            setTimeout("$common.focusElement('" + el.id + "')", 0);
            return false;
        } else {
            return true;
        }
    },

    isChosen: function(select) {
        if (select.selectedIndex == 0) {
            alert("Please make a choice from the required " + select.name + " dropdown.");
            select.focus();
            return false;
        } else {
            return true;
        }
    },

    isEmailAddr: function(el) {
        var str = el.value;
        var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
        if (!str.match(re)) {
            alert("Not a valid email address! \nPlease verify the e-mail address format.");
            setTimeout("$common.focusElement('" + el.id + "')", 0);
            return false;
        } else {
            return true;
        }
    },

    focusElement: function(elID) {
        var el = $get(elID);
        el.focus();
        el.select();
    },

    fillSelectOneColumn: function(select, responseText, label, selectedValue) {
        select.options.length = 0;
        select.options[0] = new Option(label, "", true, true);
        var response = responseText.split("||");
        for (var i = 0; i < response.length; i++) {
            if (selectedValue == response[i])
                select.options[select.options.length] = new Option(response[i], response[i], true, true);
            else
                select.options[select.options.length] = new Option(response[i], response[i], false, false);
        }
        select.disabled = false;
    },

    fillSelectTwoColumn: function(select, responseText, label, selectedValue) {
        select.options.length = 0;
        select.options[0] = new Option(label, "", true, true);
        var response = responseText.split("||");
        for (var i = 0; i < response.length; i++) {
            var style = response[i].split(";;");
            if (selectedValue == style[0])
                select.options[select.options.length] = new Option(style[1], style[0], true, true);
            else
                select.options[select.options.length] = new Option(style[1], style[0], false, false);
        }
        select.disabled = false;
    },

    clearSelect: function(select, label) {
        if (select.options != null) {
            select.options.length = 0;
            select.options[0] = new Option(label, "", true, true);
        }
        select.disabled = true;
    },

    createHistoryObj: function(hash) {
        hash = hash.substring(1, hash.length)
        var urlArr = hash.split('&');

        var s = "{";
        for (var i = 0; i < urlArr.length; i++) {
            prmArr = urlArr[i].split('=');
            if (i > 0) s += ", ";
            s += prmArr[0] + ":\"" + unescape(prmArr[1]) + "\""
        }
        s += "}";

        var ho = eval('(' + s + ')');

        return ho;
    },


    getFirstChild: function(parent) {
        if (!parent.childNodes.length) return;
        var children = parent.childNodes.length;
        for (var i = 0; i <= children; i++) {
            if (parent.childNodes[i].nodeType == 1) {
                return parent.childNodes[i];
            }
        }
        return;
    }
}

var $common = Motorwebs.UI.Common = new Motorwebs.UI._Common();