function popUp(URL, w, h, scroll) {
day = new Date();
id = day.getTime();
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings = 'height='+h+',width='+w+',top='+(TopPosition-50)+',left='+LeftPosition+',scrollbars='+scroll+',resizable=no';
eval("page" + id + " = window.open(URL, id, settings);");
}