// JavaScript Document
function Abrir(url,w,h) {
 leftPos = 0;
 topPos = 0;
 if (screen) {
  leftPos = (screen.width / 2) - w/2;
  topPos = (screen.height / 2) - h/2;
 }
 ventana = window.open(url,'','width='+w+',height='+h+',scrollbars=no,left='+leftPos+',top='+topPos);
}