function liHover() {
	if(document.all) {
			if(document.getElementById("navigation")) {
				var target=document.getElementById("navigation").getElementsByTagName('li'),lis=target.length
				for (var i=0; i<lis; i++) {
					var li=target[i];
					li.onmouseover=function() { if(this.className!="over") this.className+=" over"; }
					li.onmouseout=function() { this.className=this.className.replace(" over", ""); }							  
				}
			}
		}
}
window.onload=liHover;