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

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