PHP dentro de javascript

[sonmanuel]

seria mas facil poner javascript en php asi

echo '
<script>
function confirmah()
{
window.open("listaherram.php?id_maquina='.$id_maqu ina.' & id_planes='.$id_planes.',"ventana1","width=430, height=350, scrollbars=no, menubar=no, location=no, resizable=no");
}
</script> ';