function abrir(URL) {

   var width = 700;
   var height = 700;

   var left = 400;
   var top = 50;

   window.open(URL,'PopUp', 'width='+width+', height='+height+', top='+top+', left='+left+', scrollbars=yes, status=no, toolbar=no, location=no, directories=no, menubar=no, resizable=no, fullscreen=no');

}