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

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