var TimerID;

function displayPopUp(which) {
	if (ie5) {
		document.all.cover_popup.style.left = "-372px";
		document.all.cover_popup.style.visibility = "visible";
        timerID = setTimeout('hidePopUp(this)', 3000);
	}
}
function hidePopUp(which) {
	if (ie5) {
		document.all.cover_popup.style.visibility = "hidden";
        clearTimeout(timerID);
	}
}