/* Script by: www.jtricks.com
 * Version: 20071127
 * Latest version:
 * www.jtricks.com/javascript/navigation/fixed_menu.html
 */
//fixedMenuId = 'fixeddiv';
fixedMenuId = 'footerBox';

var fixedMenu =
	{
    	hasInner: typeof(window.innerWidth) == 'number',
    	hasElement: document.documentElement != null && document.documentElement.clientWidth,

    	menu: document.getElementById
        ? document.getElementById(fixedMenuId)
        : document.all
          ? document.all[fixedMenuId]
          : document.layers[fixedMenuId]
	};

fixedMenu.computeShifts = function()
	{
    	fixedMenu.shiftX = fixedMenu.hasInner
        ? pageXOffset
        : fixedMenu.hasElement
          ? document.documentElement.scrollLeft
          : document.body.scrollLeft;

		if (fixedMenu.targetLeft > 0)
        	fixedMenu.shiftX += fixedMenu.targetLeft;
    			else
				    {
				        fixedMenu.shiftX +=
				            (fixedMenu.hasElement
				              ? document.documentElement.clientWidth
				              : fixedMenu.hasInner
				                ? window.innerWidth - 20
				                : document.body.clientWidth)
				            - fixedMenu.targetRight
				            - fixedMenu.menu.offsetWidth;
				    }

		    fixedMenu.shiftY = fixedMenu.hasInner
		        ? pageYOffset
		        : fixedMenu.hasElement
		          ? document.documentElement.scrollTop
		          : document.body.scrollTop;
		    if (fixedMenu.targetTop > 0)
		        fixedMenu.shiftY += fixedMenu.targetTop;
				    else
				    {
				        fixedMenu.shiftY +=
				            (fixedMenu.hasElement
				            ? document.documentElement.clientHeight
				            : fixedMenu.hasInner
				              ? window.innerHeight - 20
				              : document.body.clientHeight)
				            - fixedMenu.targetBottom
				            - fixedMenu.menu.offsetHeight;
				    }
		};

fixedMenu.moveMenu = function()
	{
	    fixedMenu.computeShifts();

	    if (fixedMenu.currentX != fixedMenu.shiftX || fixedMenu.currentY != fixedMenu.shiftY)
		    {
		        fixedMenu.currentX = fixedMenu.shiftX;
		        fixedMenu.currentY = fixedMenu.shiftY;

		        if (document.layers)
			        {
			            fixedMenu.menu.left = fixedMenu.currentX;
			            fixedMenu.menu.top = fixedMenu.currentY;
			        }
			        else
				        {
				            fixedMenu.menu.style.left = fixedMenu.currentX + 'px';
				            fixedMenu.menu.style.top = fixedMenu.currentY + 'px';
				        }
		    }

	    fixedMenu.menu.style.right = '';
	    fixedMenu.menu.style.bottom = '';
	};

fixedMenu.floatMenu = function()
	{
	    fixedMenu.moveMenu();
	    setTimeout('fixedMenu.floatMenu()', 20);
	};

// addEvent designed by Aaron Moore
fixedMenu.addEvent = function(element, listener, handler)
	{
	    if(typeof element[listener] != 'function' || typeof element[listener + '_num'] == 'undefined')
		    {
		        element[listener + '_num'] = 0;

		        if (typeof element[listener] == 'function')
			        {
			            element[listener + 0] = element[listener];
			            element[listener + '_num']++;
			        }

		        element[listener] = function(e)
			        {
			            var r = true;
			            e = (e) ? e : window.event;

			            for(var i = 0; i < element[listener + '_num']; i++)
			                if(element[listener + i](e) === false)
			                    r = false;

			            return r;
			        }
		    }

	    //if handler is not already stored, assign it
	    for(var i = 0; i < element[listener + '_num']; i++)
	        if(element[listener + i] == handler)
	            return;
	    element[listener + element[listener + '_num']] = handler;
	    element[listener + '_num']++;
	};

fixedMenu.supportsFixed = function()
	{
	    var testDiv = document.createElement("div");
	    testDiv.id = "testingPositionFixed";
	    testDiv.style.position = "fixed";
	    testDiv.style.top = "0px";
	    testDiv.style.right = "0px";
	    document.body.appendChild(testDiv);
	    var offset = 1;

	    if (typeof testDiv.offsetTop == "number" && testDiv.offsetTop != null && testDiv.offsetTop != "undefined")
		    {
		        offset = parseInt(testDiv.offsetTop);
		    }

	    if (offset == 0)
		    {
		        return true;
		    }

	    return false;
	};

fixedMenu.init = function()
	{
	    if (fixedMenu.supportsFixed())
	        fixedMenu.menu.style.position = "fixed";
			    else
				    {
				        var ob =
				            document.layers
				            ? fixedMenu.menu
				            : fixedMenu.menu.style;

				        fixedMenu.targetLeft = parseInt(ob.left);
				        fixedMenu.targetTop = parseInt(ob.top);
				        fixedMenu.targetRight = parseInt(ob.right);
				        fixedMenu.targetBottom = parseInt(ob.bottom);

				        if (document.layers)
					        {
					            menu.left = 0;
					            menu.top = 0;
					        }

				        fixedMenu.addEvent(window, 'onscroll', fixedMenu.moveMenu);
				        fixedMenu.floatMenu();
				    }
	};

fixedMenu.addEvent(window, 'onload', fixedMenu.init);