function ieNav() 
{
	var navigation = document.getElementById("navigation");
	var listitems = navigation.getElementsByTagName("li");
	for (var i=0; i<listitems.length; i++ ) 
	{
		listitems[i].oldClassName = listitems[i].className
		
		listitems[i].onmouseover = function() 
		{ 
			addClass(this, 'hover');
			
			var dropDown = this.getElementsByTagName('ul')[0];
			
			if(dropDown != undefined)
			{
				ddWidth = dropDown.offsetWidth - 9;
				ddHeight = dropDown.offsetHeight;
							
				var iframe =
				"<iframe style=\"position: absolute; display: block; " +
				"z-index: -1; width: " + ddWidth + "; height: " + ddHeight + "; top: 0; left: 8px;" +
				"filter: mask(); background-color: #ffffff; \" frameborder=\"0\"></iframe>";
				
				var hasIframe = dropDown.getElementsByTagName('iframe')[0];
				if(hasIframe == undefined) { dropDown.innerHTML += iframe; }
			}
		}
		listitems[i].onmouseout = function() 
		{ this.className = this.oldClassName; }
	}  
}

if (is_ie6)
    addLoadEvent(ieNav);