function popUp(URL) {
var winl = (screen.width - 650) / 2;
var wint = ((screen.height - 500) / 2)-50;
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=650,height=600,left = "+winl+",top = "+wint+"');");
}