//Check if we're in IE 6
var agt				= navigator.userAgent.toLowerCase();
var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
var is_ie6    = (is_ie && agt.indexOf("msie 6.")!=-1 );    


// Activate background image caching on IE6 to prevent image flicker
if (is_ie6) {
	document.execCommand('BackgroundImageCache', false, true);
}

function dropDown(){
	if (document.all&&document.getElementById)
	{
		navRoot = document.getElementById("nav_ul");
		for (i=0; i<navRoot.childNodes.length; i++)
		{
			node = navRoot.childNodes[i];
			if (node.nodeName=="LI") {
				node.onmouseover=function() {
					this.className+=" over";
				}
				node.onmouseout=function() {
					this.className=this.className.replace(" over", "");
				}
			}
		}
	}
}

window.onload = function(){
	dropDown();
}