function initPage()
{
	var navRoot = document.getElementById("portfolio");
	var lis = navRoot.getElementsByTagName("a");
	var screen = navRoot.getElementsByTagName("a");
	for (var i=0; i<lis.length; i++)
	{
		if (lis[i].className == "left"){
			lis[i].onmouseover = function()
			{
				this.parentNode.className += " hover";
	                }
			lis[i].onmouseout = function()
			{
				this.parentNode.className = this.className.replace(new RegExp(" hover"),"");
			}
		}
	}
}

if (window.addEventListener)
	window.addEventListener("load", initPage, false);
else if (window.attachEvent)
	window.attachEvent("onload", initPage);