function el(name) {
	return document.getElementById(name);
}

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

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




<!-- Begin
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=600,height=400,left = 100,top = 100');");
}
// End -->