startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
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=startList;



<!------- Pop up Function ------->

function popwin(loc,winname,w,h,scroll,resize) {
var newwin = window.open( loc, winname, "width="+w+",height="+h+",top="+((screen.height - h) / 2)+",left="+((screen.width - w) / 2)+",location=no,scrollbars="+scroll+",menubar=yes,toolbar=yes,resizable="+resize);
 } // function..popwin