how can i put readonly field using rich text editor and $_SESSION

Hi,

this code works for me if fields are not using rich text editor, on the file_edit.php file at the end:

if ($_SESSION["GroupID"] == "Portero" || $_SESSION["GroupID"] == "Todero" || $_SESSION["GroupID"] == "Aseador"){

echo "<script type=\"text/javascript\">";

echo "document.forms.editform.value_apto.disabled=true;";

echo "document.forms.editform.value_usuario.disabled=true;";

echo "document.forms.editform.value_tipo.disabled=true;";

echo "document.forms.editform.value_fechaevento.disabled=true;";

echo "document.forms.editform.value_descripcion.disabled=true;";

echo "document.forms.editform.value_alarma.disabled=true;";

echo "document.forms.editform.value_repetirtipo.disabled=true;";

echo "document.forms.editform.value_repetirfrecuencia.disabled=true;";

echo "document.forms.editform.value_fechainicio.disabled=true;";

echo "document.forms.editform.value_fechafin.disabled=true;";

echo "</script>";

}

but if i want to do this using rich text editor i can't, please help me!!