function closeBox() {
	if (document.getElementById) { // DOM3 = IE5, NS6
		document.getElementById('wrap_alert').style.visibility = 'hidden';
	}
	else {
		if (document.layers) { // Netscape 4
			document.wrap_alert.visibility = 'hidden';
		}
		else { // IE 4
			document.all.hideShow.style.visibility = 'hidden';
		}
	}
}