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, left, top){
	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 : 0)*/
		subobj.style.left=left
		subobj.style.top=top
		return false
		}
	else
	return true
}

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