function popUp(URL,w,h) {
day = new Date();
id = day.getTime();
var winl = (screen.width-w)/2;
var wint = (screen.height-h)/2;

eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width='+w+',height='+w+',left='+winl+',top='+winl);");
}