function popupnew(URL)
  {
    var height = screen.availHeight*0.5;
    var width = 600;
    
    var str = "height=" + height + ",innerHeight=" + height;
    str += ",width=" + width + ",innerWidth=" + width;    
    
    var xc = (screen.availWidth - width) / 2;
    var yc = (screen.availHeight - height) / 2;

    str += ",left=" + xc + ",screenX=" + xc;
    str += ",top=" + yc + ",screenY=" + yc;
    
    str += ",scrollbars=1,resizable=1";

    window.open(URL ,"_blank", str);
  }