function Popup(URL, w, h){
		LeftPosition = (screen.width-w)/2;
		TopPosition = (screen.height-h)/2;
		params="status=no,resizable=no,scrollbars=no,menubar=no,toolbar=no,titlebar=no,width="+ w +",height="+ h +",top="+TopPosition+",left="+LeftPosition+",directories=no;"
		popup=window.open(URL,"js24popup",params);
}