function abre(url, x, y, scroll) {
  window.name = "main";
  window.open(url,'ventana','width='+x+',height='+y+','+scroll+',top=100,left=450');
}
function video(url, x, y, scroll) {
  window.name = "mainv";
  window.open(url,'ventanav','width='+x+',height='+y+','+scroll+',top=50,left=150');
}