/***********************************************
* 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);
		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 : 0);
		subobj.style.left=xpos+"px";
		subobj.style.top=ypos+"px";
		subobj.style.display=(subobj.style.display!="block")? "block" : "none";
		return false;
	}
	else
		return true;
}
 
var myObj;
function overlayclose(subobj, time) {	
	myObj = subobj;
	if(time!='')
		setTimeout("hideOverlay()", time);
	else
		setTimeout("hideOverlay()", 1000);
}
function hideOverlay() {
	if(myObj!=null)
		document.getElementById(myObj).style.display="none";
}