function popUp(URL) {
var windowReference;
day = new Date();
id = day.getTime();
 if (!windowReference) {
      windowReference = window.open(URL, "detail",
        'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=1,width=450,height=300,left = 100,top = 100');

 } else {
      windowReference.url = URL;
  }
 if (window.focus) {windowReference.focus()}
 if (!windowReference.opener)
     windowReference.opener = self;

}