var show = null;

function PopUp(theUrl) {
    show = window.open('','','status=0,menubar=1,width=520,height=480,left=0,top=0,resizable=1,scrollbars=1');
    if (show != null) {
        if (show.opener == null) {
             show.opener = self;
          }
          show.location.href = theUrl;
    }
}