// JavaScript Document
function showHide( id )
{
var el;
if (document.getElementById) {
el = document.getElementById(id);
} else if (document.all) {
el = document.all[id];
} else if (document.layers) {
el = document.layers( id )
}

if ( el.style ){
el.style.visibility =
('visible' == el.style.visibility)? 'hidden':'visible';
}
}
function overlay() {
	el = document.getElementById("overlay");
	el.style.visibility = (el.style.visibility == "visible") ? "hidden" : "visible";
}
function timedDiv()
{
var t=setTimeout("showHide('overlay')",5000);
}