/***********************************************
* 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 toggle_overlay(overlay_obj_str)
{
	if (document.getElementById)
	{
		var over_obj=document.getElementById(overlay_obj_str);
		over_obj.style.display=(over_obj.style.display!="block")? "block" : "none";
		over_obj.style.left = ((document.body.offsetWidth - over_obj.offsetWidth) / 2) + "px";
		over_obj.style.top = "35px";
	}
}