function PopWin(url, name, width, height) {
	h = (height) ? height : 500;
	w = (width) ? width : 600;
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	settings =  'height='+ h +',width='+ w +',top='+TopPosition+',left='+LeftPosition+',scrollbars=yes,resizable';
	//if (wini && !wini.closed)
	//		wini.resizeTo(w, h);
	wini = window.open(url,name,settings);
	if (wini)
		wini.focus();
	return ( !wini )
}