function abrir($url) {

   var width = 520;
   var height = 290;

   var left = 252;
   var top = 239;

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

}