/*-------------------------------------------------------------------- 
Scripts for creating and manipulating custom menus based on standard <ul> markup
Version: 3.0, 03.31.2009

By: Maggie Costello Wachs (maggie@filamentgroup.com) and Scott Jehl (scott@filamentgroup.com)
	http://www.filamentgroup.com
	* reference articles: http://www.filamentgroup.com/lab/jquery_ipod_style_drilldown_menu/
		
Copyright (c) 2009 Filament Group
Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL (filamentgroup.com/examples/gpl-license.txt) licenses.
--------------------------------------------------------------------*/


var allUIMenus = [];

$.fn.menu = function(options){
    var caller = this;
    var options = options;
    var m = new Menu(caller, options);	
    allUIMenus.push(m);
	
    $(this)
    .mousedown(function(){
        if (!m.menuOpen) {
            m.showLoading();
        };
    })	
    .click(function(){
        if (m.menuOpen == false) {
            m.showMenu();
        }
        else {
            m.kill();
        };
        return false;
    });	
};

function Menu(caller, options){
    var menu = this;
    var caller = $(caller);
    var container = $('<div class="fg-menu-container ui-widget ui-widget-content ui-corner-all">'+options.content+'</div>');
	
    this.menuOpen = false;
    this.menuExists = false;
	
    var options = jQuery.extend({
        content: null,
        width: 180, // width of menu container, must be set or passed in to calculate widths of child menus
        maxHeight: 180, // max height of menu (if a drilldown: height does not include breadcrumb)
        positionOpts: {
            posX: 'left', 
            posY: 'bottom',
            offsetX: 0,
            offsetY: 0,
            directionH: 'right',
            directionV: 'down', 
            detectH: true, // do horizontal collision detection  
            detectV: true, // do vertical collision detection
            linkToFront: false
        },
        showSpeed: 200, // show/hide speed in milliseconds
        callerOnState: 'ui-state-active', // class to change the appearance of the link/button when the menu is showing
        loadingState: 'ui-state-loading', // class added to the link/button while the menu is created
        linkHover: 'ui-state-hover', // class for menu option hover state
        linkHoverSecondary: 'li-hover', // alternate class, may be used for multi-level menus		
        // ----- multi-level menu defaults -----
        crossSpeed: 200, // cross-fade speed for multi-level menus
        crumbDefaultText: 'Choose an option:',
        backLink: true, // in the ipod-style menu: instead of breadcrumbs, show only a 'back' link
        backLinkText: 'Back',
        flyOut: false, // multi-level menus are ipod-style by default; this parameter overrides to make a flyout instead
        flyOutOnState: 'ui-state-default',
        nextMenuLink: 'ui-icon-triangle-1-e', // class to style the link (specifically, a span within the link) used in the multi-level menu to show the next level
        topLinkText: 'All',
        nextCrumbLink: 'ui-icon-carat-1-e'	
    }, options);
	
    var killAllMenus = function(){
        $.each(allUIMenus, function(i){
            if (allUIMenus[i].menuOpen) {
                allUIMenus[i].kill();
            };	
        });
    };
	
    this.kill = function(){
        caller
        .removeClass(options.loadingState)
        .removeClass('fg-menu-open')
        .removeClass(options.callerOnState);	
        container.find('li').removeClass(options.linkHoverSecondary).find('a').removeClass(options.linkHover);		
        if (options.flyOutOnState) {
            container.find('li a').removeClass(options.flyOutOnState);
        };	
        if (options.callerOnState) {
            caller.removeClass(options.callerOnState);
        };			
        if (container.is('.fg-menu-ipod')) {
            menu.resetDrilldownMenu();
        };
        if (container.is('.fg-menu-flyout')) {
            menu.resetFlyoutMenu();
        };	
        container.parent().hide();	
        menu.menuOpen = false;
        $(document).unbind('click', killAllMenus);
        $(document).unbind('keydown');
    };
	
    this.showLoading = function(){
        caller.addClass(options.loadingState);
    };

    this.showMenu = function(){
        killAllMenus();
        if (!menu.menuExists) {
            menu.create()
        };
        caller
        .addClass('fg-menu-open')
        .addClass(options.callerOnState);
        container.parent().show().click(function(){
            menu.kill();
            return false;
        });
        container.hide().slideDown(options.showSpeed).find('.fg-menu:eq(0)');
        menu.menuOpen = true;
        caller.removeClass(options.loadingState);
        $(document).click(killAllMenus);
		
        // assign key events
        $(document).keydown(function(event){
            var e;
            if (event.which !="") {
                e = event.which;
            }
            else if (event.charCode != "") {
                e = event.charCode;
            }
            else if (event.keyCode != "") {
                e = event.keyCode;
            }
			
            var menuType = ($(event.target).parents('div').is('.fg-menu-flyout')) ? 'flyout' : 'ipod' ;
			
            switch(e) {
                case 37: // left arrow 
                    if (menuType == 'flyout') {
                        $(event.target).trigger('mouseout');
                        if ($('.'+options.flyOutOnState).size() > 0) {
                            $('.'+options.flyOutOnState).trigger('mouseover');
                        };
                    };
					
                    if (menuType == 'ipod') {
                        $(event.target).trigger('mouseout');
                        if ($('.fg-menu-footer').find('a').size() > 0) {
                            $('.fg-menu-footer').find('a').trigger('click');
                        };
                        if ($('.fg-menu-header').find('a').size() > 0) {
                            $('.fg-menu-current-crumb').prev().find('a').trigger('click');
                        };
                        if ($('.fg-menu-current').prev().is('.fg-menu-indicator')) {
                            $('.fg-menu-current').prev().trigger('mouseover');							
                        };						
                    };
                    return false;
                    break;
					
                case 38: // up arrow 
                    if ($(event.target).is('.' + options.linkHover)) {	
                        var prevLink = $(event.target).parent().prev().find('a:eq(0)');						
                        if (prevLink.size() > 0) {
                            $(event.target).trigger('mouseout');
                            prevLink.trigger('mouseover');
                        };						
                    }
                    else {
                        container.find('a:eq(0)').trigger('mouseover');
                    }
                    return false;
                    break;
					
                case 39: // right arrow 
                    if ($(event.target).is('.fg-menu-indicator')) {						
                        if (menuType == 'flyout') {
                            $(event.target).next().find('a:eq(0)').trigger('mouseover');
                        }
                        else if (menuType == 'ipod') {
                            $(event.target).trigger('click');						
                            setTimeout(function(){
                                $(event.target).next().find('a:eq(0)').trigger('mouseover');
                            }, options.crossSpeed);
                        };				
                    }; 
                    return false;
                    break;
					
                case 40: // down arrow 
                    if ($(event.target).is('.' + options.linkHover)) {
                        var nextLink = $(event.target).parent().next().find('a:eq(0)');						
                        if (nextLink.size() > 0) {							
                            $(event.target).trigger('mouseout');
                            nextLink.trigger('mouseover');
                        };				
                    }
                    else {
                        container.find('a:eq(0)').trigger('mouseover');
                    }		
                    return false;						
                    break;
					
                case 27: // escape
                    killAllMenus();
                    break;
					
                case 13: // enter
                    if ($(event.target).is('.fg-menu-indicator') && menuType == 'ipod') {							
                        $(event.target).trigger('click');						
                        setTimeout(function(){
                            $(event.target).next().find('a:eq(0)').trigger('mouseover');
                        }, options.crossSpeed);					
                    }; 
                    break;
            };			
        });
    };
	
    this.create = function(){	
        container.css({
            width: options.width
        }).appendTo('body').find('ul:first').not('.fg-menu-breadcrumb').addClass('fg-menu');
        container.find('ul, li a').addClass('ui-corner-all');
		
        // aria roles & attributes
        container.find('ul').attr('role', 'menu').eq(0).attr('aria-activedescendant','active-menuitem').attr('aria-labelledby', caller.attr('id'));
        container.find('li').attr('role', 'menuitem');
        container.find('li:has(ul)').attr('aria-haspopup', 'true').find('ul').attr('aria-expanded', 'false');
        container.find('a').attr('tabindex', '-1');
		
        // when there are multiple levels of hierarchy, create flyout or drilldown menu
        if (container.find('ul').size() > 1) {
            if (options.flyOut) {
                menu.flyout(container, options);
            }
            else {
                menu.drilldown(container, options);
            }	
        }
        else {
            container.find('a').click(function(){
                menu.chooseItem(this);
                return false;
            });
        };	
		
        if (options.linkHover) {
            var allLinks = container.find('.fg-menu li a');
            allLinks.hover(
                function(){
                    var menuitem = $(this);
                    $('.'+options.linkHover).removeClass(options.linkHover).blur().parent().removeAttr('id');
                    $(this).addClass(options.linkHover).focus().parent().attr('id','active-menuitem');
                },
                function(){
                    $(this).removeClass(options.linkHover).blur().parent().removeAttr('id');
                }
                );
        };
		
        if (options.linkHoverSecondary) {
            container.find('.fg-menu li').hover(
                function(){
                    $(this).siblings('li').removeClass(options.linkHoverSecondary);
                    if (options.flyOutOnState) {
                        $(this).siblings('li').find('a').removeClass(options.flyOutOnState);
                    }
                    $(this).addClass(options.linkHoverSecondary);
                },
                function(){
                    $(this).removeClass(options.linkHoverSecondary);
                }
                );
        };	
		
        menu.setPosition(container, caller, options);
        menu.menuExists = true;
    };
	
    this.chooseItem = function(item){
        menu.kill();
        // edit this for your own custom function/callback:
        $('#menuSelection').text($(item).text());	
        location.href = $(item).attr('href');
    };
};

Menu.prototype.flyout = function(container, options) {
    var menu = this;
	
    this.resetFlyoutMenu = function(){
        var allLists = container.find('ul ul');
        allLists.removeClass('ui-widget-content').hide();	
    };
	
    container.addClass('fg-menu-flyout').find('li:has(ul)').each(function(){
        var linkWidth = container.width();
        var showTimer, hideTimer;
        var allSubLists = $(this).find('ul');		
		
        allSubLists.css({
            left: linkWidth, 
            width: linkWidth
        }).hide();
			
        $(this).find('a:eq(0)').addClass('fg-menu-indicator').html('<span>' + $(this).find('a:eq(0)').text() + '</span><span class="ui-icon '+options.nextMenuLink+'"></span>').hover(
            function(){
                clearTimeout(hideTimer);
                var subList = $(this).next();
                if (!fitVertical(subList, $(this).offset().top)) {
                    subList.css({
                        top: 'auto', 
                        bottom: 0
                    });
                };
                if (!fitHorizontal(subList, $(this).offset().left + 100)) {
                    subList.css({
                        left: 'auto', 
                        right: linkWidth, 
                        'z-index': 999
                    });
                };
                showTimer = setTimeout(function(){
                    subList.addClass('ui-widget-content').show(options.showSpeed).attr('aria-expanded', 'true');	
                }, 300);	
            },
            function(){
                clearTimeout(showTimer);
                var subList = $(this).next();
                hideTimer = setTimeout(function(){
                    subList.removeClass('ui-widget-content').hide(options.showSpeed).attr('aria-expanded', 'false');
                }, 400);	
            }
            );

        $(this).find('ul a').hover(
            function(){
                clearTimeout(hideTimer);
                if ($(this).parents('ul').prev().is('a.fg-menu-indicator')) {
                    $(this).parents('ul').prev().addClass(options.flyOutOnState);
                }
            },
            function(){
                hideTimer = setTimeout(function(){
                    allSubLists.hide(options.showSpeed);
                    container.find(options.flyOutOnState).removeClass(options.flyOutOnState);
                }, 500);	
            }
            );	
    });
	
    container.find('a').click(function(){
        menu.chooseItem(this);
        return false;
    });
};


Menu.prototype.drilldown = function(container, options) {
    var menu = this;	
    var topList = container.find('.fg-menu');	
    var breadcrumb = $('<ul class="fg-menu-breadcrumb ui-widget-header ui-corner-all ui-helper-clearfix"></ul>');
    var crumbDefaultHeader = $('<li class="fg-menu-breadcrumb-text">'+options.crumbDefaultText+'</li>');
    var firstCrumbText = (options.backLink) ? options.backLinkText : options.topLinkText;
    var firstCrumbClass = (options.backLink) ? 'fg-menu-prev-list' : 'fg-menu-all-lists';
    var firstCrumbLinkClass = (options.backLink) ? 'ui-state-default ui-corner-all' : '';
    var firstCrumbIcon = (options.backLink) ? '<span class="ui-icon ui-icon-triangle-1-w"></span>' : '';
    var firstCrumb = $('<li class="'+firstCrumbClass+'"><a href="#" class="'+firstCrumbLinkClass+'">'+firstCrumbIcon+firstCrumbText+'</a></li>');
	
    container.addClass('fg-menu-ipod');
	
    if (options.backLink) {
        breadcrumb.addClass('fg-menu-footer').appendTo(container).hide();
    }
    else {
        breadcrumb.addClass('fg-menu-header').prependTo(container);
    };
    breadcrumb.append(crumbDefaultHeader);
	
    var checkMenuHeight = function(el){
        if (el.height() > options.maxHeight) {
            el.addClass('fg-menu-scroll')
        };	
        el.css({
            height: options.maxHeight
        });
    };
	
    var resetChildMenu = function(el){
        el.removeClass('fg-menu-scroll').removeClass('fg-menu-current').height('auto');
    };
	
    this.resetDrilldownMenu = function(){
        $('.fg-menu-current').removeClass('fg-menu-current');
        topList.animate({
            left: 0
        }, options.crossSpeed, function(){
            $(this).find('ul').each(function(){
                $(this).hide();
                resetChildMenu($(this));				
            });
            topList.addClass('fg-menu-current');			
        });		
        $('.fg-menu-all-lists').find('span').remove();	
        breadcrumb.empty().append(crumbDefaultHeader);		
        $('.fg-menu-footer').empty().hide();	
        checkMenuHeight(topList);		
    };
	
    topList
    .addClass('fg-menu-content fg-menu-current ui-widget-content ui-helper-clearfix')
    .css({
        width: container.width()
    })
    .find('ul')
    .css({
        width: container.width(), 
        left: container.width()
    })
    .addClass('ui-widget-content')
    .hide();		
    checkMenuHeight(topList);	
	
    topList.find('a').each(function(){
        // if the link opens a child menu:
        if ($(this).next().is('ul')) {
            $(this)
            .addClass('fg-menu-indicator')
            .each(function(){
                $(this).html('<span>' + $(this).text() + '</span><span class="ui-icon '+options.nextMenuLink+'"></span>');
            })
            .click(function(){ // ----- show the next menu			
                var nextList = $(this).next();
                var parentUl = $(this).parents('ul:eq(0)');   		
                var parentLeft = (parentUl.is('.fg-menu-content')) ? 0 : parseFloat(topList.css('left'));    		
                var nextLeftVal = Math.round(parentLeft - parseFloat(container.width()));
                var footer = $('.fg-menu-footer');
		    		
                // show next menu   		
                resetChildMenu(parentUl);
                checkMenuHeight(nextList);
                topList.animate({
                    left: nextLeftVal
                }, options.crossSpeed);						
                nextList.show().addClass('fg-menu-current').attr('aria-expanded', 'true');    
		    		
                var setPrevMenu = function(backlink){
                    var b = backlink;
                    var c = $('.fg-menu-current');
                    var prevList = c.parents('ul:eq(0)');
                    c.hide().attr('aria-expanded', 'false');
                    resetChildMenu(c);
                    checkMenuHeight(prevList);
                    prevList.addClass('fg-menu-current').attr('aria-expanded', 'true');
                    if (prevList.hasClass('fg-menu-content')) {
                        b.remove();
                        footer.hide();
                    };
                };		
		
                // initialize "back" link
                if (options.backLink) {
                    if (footer.find('a').size() == 0) {
                        footer.show();
                        $('<a href="#"><span class="ui-icon ui-icon-triangle-1-w"></span> <span>Back</span></a>')
                        .appendTo(footer)
                        .click(function(){ // ----- show the previous menu
                            var b = $(this);
                            var prevLeftVal = parseFloat(topList.css('left')) + container.width();		    						    		
                            topList.animate({
                                left: prevLeftVal
                            },  options.crossSpeed, function(){
                                setPrevMenu(b);
                            });			
                            return false;
                        });
                    }
                }
                // or initialize top breadcrumb
                else { 
                    if (breadcrumb.find('li').size() == 1){				
                        breadcrumb.empty().append(firstCrumb);
                        firstCrumb.find('a').click(function(){
                            menu.resetDrilldownMenu();
                            return false;
                        });
                    }
                    $('.fg-menu-current-crumb').removeClass('fg-menu-current-crumb');
                    var crumbText = $(this).find('span:eq(0)').text();
                    var newCrumb = $('<li class="fg-menu-current-crumb"><a href="javascript://" class="fg-menu-crumb">'+crumbText+'</a></li>');	
                    newCrumb
                    .appendTo(breadcrumb)
                    .find('a').click(function(){
                        if ($(this).parent().is('.fg-menu-current-crumb')){
                            menu.chooseItem(this);
                        }
                        else {
                            var newLeftVal = - ($('.fg-menu-current').parents('ul').size() - 1) * 180;
                            topList.animate({
                                left: newLeftVal
                            }, options.crossSpeed, function(){
                                setPrevMenu();
                            });
								
                            // make this the current crumb, delete all breadcrumbs after this one, and navigate to the relevant menu
                            $(this).parent().addClass('fg-menu-current-crumb').find('span').remove();
                            $(this).parent().nextAll().remove();									
                        };
                        return false;
                    });
                    newCrumb.prev().append(' <span class="ui-icon '+options.nextCrumbLink+'"></span>');
                };			
                return false;    		
            });
        }
        // if the link is a leaf node (doesn't open a child menu)
        else {
            $(this).click(function(){
                menu.chooseItem(this);
                return false;
            });
        };
    });
};


/* Menu.prototype.setPosition parameters (defaults noted with *):
	referrer = the link (or other element) used to show the overlaid object 
	settings = can override the defaults:
		- posX/Y: where the top left corner of the object should be positioned in relation to its referrer.
				X: left*, center, right
				Y: top, center, bottom*
		- offsetX/Y: the number of pixels to be offset from the x or y position.  Can be a positive or negative number.
		- directionH/V: where the entire menu should appear in relation to its referrer.
				Horizontal: left*, right
				Vertical: up, down*
		- detectH/V: detect the viewport horizontally / vertically
		- linkToFront: copy the menu link and place it on top of the menu (visual effect to make it look like it overlaps the object) */

Menu.prototype.setPosition = function(widget, caller, options) { 
    var el = widget;
    var referrer = caller;
    var dims = {
        refX: referrer.offset().left,
        refY: referrer.offset().top,
        refW: referrer.getTotalWidth(),
        refH: referrer.getTotalHeight()
    };	
    var options = options;
    var xVal, yVal;
	
    var helper = $('<div class="positionHelper"></div>');
    helper.css({
        position: 'absolute', 
        left: dims.refX, 
        top: dims.refY, 
        width: dims.refW, 
        height: dims.refH
    });
    el.wrap(helper);
	
    // get X pos
    switch(options.positionOpts.posX) {
        case 'left':
            xVal = 0; 
            break;				
        case 'center':
            xVal = dims.refW / 2;
            break;				
        case 'right':
            xVal = dims.refW;
            break;
    };
	
    // get Y pos
    switch(options.positionOpts.posY) {
        case 'top':
            yVal = 0;
            break;				
        case 'center':
            yVal = dims.refH / 2;
            break;				
        case 'bottom':
            yVal = dims.refH;
            break;
    };
	
    // add the offsets (zero by default)
    xVal += options.positionOpts.offsetX;
    yVal += options.positionOpts.offsetY;
	
    // position the object vertically
    if (options.positionOpts.directionV == 'up') {
        el.css({
            top: 'auto', 
            bottom: yVal
        });
        if (options.positionOpts.detectV && !fitVertical(el)) {
            el.css({
                bottom: 'auto', 
                top: yVal
            });
        }
    } 
    else {
        el.css({
            bottom: 'auto', 
            top: yVal
        });
        if (options.positionOpts.detectV && !fitVertical(el)) {
            el.css({
                top: 'auto', 
                bottom: yVal
            });
        }
    };
	
    // and horizontally
    if (options.positionOpts.directionH == 'left') {
        el.css({
            left: 'auto', 
            right: xVal
        });
        if (options.positionOpts.detectH && !fitHorizontal(el)) {
            el.css({
                right: 'auto', 
                left: xVal
            });
        }
    } 
    else {
        el.css({
            right: 'auto', 
            left: xVal
        });
        if (options.positionOpts.detectH && !fitHorizontal(el)) {
            el.css({
                left: 'auto', 
                right: xVal
            });
        }
    };
	
    // if specified, clone the referring element and position it so that it appears on top of the menu
    if (options.positionOpts.linkToFront) {
        referrer.clone().addClass('linkClone').css({
            position: 'absolute', 
            top: 0, 
            right: 'auto', 
            bottom: 'auto', 
            left: 0, 
            width: referrer.width(), 
            height: referrer.height()
        }).insertAfter(el);
    };
};


/* Utilities to sort and find viewport dimensions */

function sortBigToSmall(a, b) {
    return b - a;
};

jQuery.fn.getTotalWidth = function(){
    return $(this).width() + parseInt($(this).css('paddingRight')) + parseInt($(this).css('paddingLeft')) + parseInt($(this).css('borderRightWidth')) + parseInt($(this).css('borderLeftWidth'));
};

jQuery.fn.getTotalHeight = function(){
    return $(this).height() + parseInt($(this).css('paddingTop')) + parseInt($(this).css('paddingBottom')) + parseInt($(this).css('borderTopWidth')) + parseInt($(this).css('borderBottomWidth'));
};

function getScrollTop(){
    return self.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
};

function getScrollLeft(){
    return self.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft;
};

function getWindowHeight(){
    var de = document.documentElement;
    return self.innerHeight || (de && de.clientHeight) || document.body.clientHeight;
};

function getWindowWidth(){
    var de = document.documentElement;
    return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
};

/* Utilities to test whether an element will fit in the viewport
	Parameters:
	el = element to position, required
	leftOffset / topOffset = optional parameter if the offset cannot be calculated (i.e., if the object is in the DOM but is set to display: 'none') */
	
function fitHorizontal(el, leftOffset){
    var leftVal = parseInt(leftOffset) || $(el).offset().left;
    return (leftVal + $(el).width() <= getWindowWidth() + getScrollLeft() && leftVal - getScrollLeft() >= 0);
};

function fitVertical(el, topOffset){
    var topVal = parseInt(topOffset) || $(el).offset().top;
    return (topVal + $(el).height() <= getWindowHeight() + getScrollTop() && topVal - getScrollTop() >= 0);
};

/*-------------------------------------------------------------------- 
 * javascript method: "pxToEm"
 * by:
   Scott Jehl (scott@filamentgroup.com) 
   Maggie Wachs (maggie@filamentgroup.com)
   http://www.filamentgroup.com
 *
 * Copyright (c) 2008 Filament Group
 * Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL (filamentgroup.com/examples/gpl-license.txt) licenses.
 *
 * Description: Extends the native Number and String objects with pxToEm method. pxToEm converts a pixel value to ems depending on inherited font size.  
 * Article: http://www.filamentgroup.com/lab/retaining_scalable_interfaces_with_pixel_to_em_conversion/
 * Demo: http://www.filamentgroup.com/examples/pxToEm/	 	
 *							
 * Options:  	 								
 		scope: string or jQuery selector for font-size scoping
 		reverse: Boolean, true reverses the conversion to em-px
 * Dependencies: jQuery library						  
 * Usage Example: myPixelValue.pxToEm(); or myPixelValue.pxToEm({'scope':'#navigation', reverse: true});
 *
 * Version: 2.0, 08.01.2008 
 * Changelog:
 *		08.02.2007 initial Version 1.0
 *		08.01.2008 - fixed font-size calculation for IE
--------------------------------------------------------------------*/

Number.prototype.pxToEm = String.prototype.pxToEm = function(settings){
    //set defaults
    settings = jQuery.extend({
        scope: 'body',
        reverse: false
    }, settings);
	
    var pxVal = (this == '') ? 0 : parseFloat(this);
    var scopeVal;
    var getWindowWidth = function(){
        var de = document.documentElement;
        return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
    };	
	
    /* When a percentage-based font-size is set on the body, IE returns that percent of the window width as the font-size. 
		For example, if the body font-size is 62.5% and the window width is 1000px, IE will return 625px as the font-size. 	
		When this happens, we calculate the correct body font-size (%) and multiply it by 16 (the standard browser font size) 
		to get an accurate em value. */
				
    if (settings.scope == 'body' && $.browser.msie && (parseFloat($('body').css('font-size')) / getWindowWidth()).toFixed(1) > 0.0) {
        var calcFontSize = function(){		
            return (parseFloat($('body').css('font-size'))/getWindowWidth()).toFixed(3) * 16;
        };
        scopeVal = calcFontSize();
    }
    else {
        scopeVal = parseFloat(jQuery(settings.scope).css("font-size"));
    };
			
    var result = (settings.reverse == true) ? (pxVal * scopeVal).toFixed(2) + 'px' : (pxVal / scopeVal).toFixed(2) + 'em';
    return result;
};