function popupc(URL,w,h) {

   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);
      window.open(URL,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l+ 'toolbar=0,scrollbars=no,location=no,statusbar=no,menubar=no,resizable=no');
 }