function display_ex(id, idx) {
  if (document.getElementById){
	if (document.getElementById(id+idx)) {
	  j = 0;
	  while (document.getElementById(id + j)) {
		document.getElementById(id + j).style.display = 'none';
		j++;
	  }
	  document.getElementById(id + idx).style.display = 'block';
	}
  }
}

function selectTabCont(tabs, item) {
	var tab = document.getElementById(tabs).getElementsByTagName('li');
	var i = new Number();
	for (i = 0; i < tab.length; i++)
	{
		document.getElementById(tabs+i).style.display = "none";
		tab[i].className = "";
		tab[i].getElementsByTagName("a")[0].className = "";
	}
	tab[item].className = "tm";
	tab[item].getElementsByTagName("a")[0].className = "tma";
	document.getElementById(tabs+item).style.display = "block";
}


function selectTab(id, cls, clsa) {
	document.getElementById(id).className = cls;
	document.getElementById(id).getElementsByTagName("a")[0].className = clsa;
}

function setClass(id, cls) {
	document.getElementById(id).className = cls;
}

function selectULA(id, idx, cls, clsa) {
	li = document.getElementById(id).getElementsByTagName("li")[idx];
	li.className = cls;
	li.getElementsByTagName("a")[0].className = clsa;
}
/***********************************************
* Drop Down/ Overlapping Content- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

function getposOffset(overlay, offsettype){
	var totaloffset=(offsettype=="left")? overlay.offsetLeft : overlay.offsetTop;
	var parentEl=overlay.offsetParent;
	while (parentEl!=null){
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft :	totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
	return totaloffset;
}

function overlay(curobj, subobjstr, opt_position){
	if (document.getElementById){
		var subobj=document.getElementById(subobjstr);
		subobj.style.display=(subobj.style.display!="block")? "block" : "none";
		var xpos=getposOffset(curobj, "left")+((typeof opt_position!="undefined" && opt_position.indexOf("right")!=-1)? -(subobj.offsetWidth-curobj.offsetWidth) : 0);
		var ypos=getposOffset(curobj, "top")+((typeof opt_position!="undefined" && opt_position.indexOf("bottom")!=-1)? curobj.offsetHeight : -(curobj.offsetHeight-curobj.offsetHeight));
		subobj.style.left=xpos+"px";
		subobj.style.top=ypos+"px";
		return false;
		}
	else
		return true;
}

function overlayclose(subobj){
	document.getElementById(subobj).style.display="none"
}