IE = navigator.appName=="Microsoft Internet Explorer";
NS = navigator.appName=="Netscape";
bVer = parseInt(navigator.appVersion);
var newWin=null;

function popup_center(loc, name, width, height) {
	var _params = "width="+width+",height="+height+",resizable=no,status=no";
	if (bVer >= 4) {
		_left = ( (screen.width-width) >>1 );
		_top = ( (screen.height-height) >>1 );
	} else {
		_left = ( (800-width) >>1 );
		_top = ( (600-height) >>1 );
	}
	_top = _top - 100;
	if (IE) _params += ",top=" + _top + ",left=" + _left;
	else if (NS) _params += ",screenX=" + _left + ",screenY=" + _top;

	newWin = window.open(loc, name, _params);
	if ( newWin!=null && !(IE && bVer<5) )
	newWin.focus(); // MSIE4 DOESN'T FOCUS WINDOWS
}

//popup_center('/noel.html', 'popup', 400, 250);