img { behavior: url(css/iepngfix.htc); }

html, body { behavior: url(css/iepngfix.htc); }

map { behavior: url(css/iepngfix.htc); }

a { behavior: url(css/iepngfix.htc); }

table, tr, th, td { behavior: url(css/iepngfix.htc); }

img, #header, .class, blockquote { behavior: url(css/iepngfix.htc); }

textarea, img { behavior: url(css/iepngfix.htc); }

.boton_login{
  background:url(../images/ingresar.png);
  background-repeat:no-repeat;
  width:52px;
  height:22px;
  border:none;
}

.boton_login_cerrar{
  background:url(../images/cancelar.png);
  background-repeat:no-repeat;
  width:52px;
  height:22px;
  border:none;
}