function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}


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", "");
               }
            }
       }
   }
}
addLoadEvent(startList);

function showhide(listvalue)
{
	var hod=document.getElementById(listvalue);
	if(hod.style.display=="none")
	{
		hod.style.display="block";
	}
	else 
	{
		hod.style.display="none";
	}
}