how to hide HTML elements using catalog client script in portal and native view.

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I've written an onLoad catalog client script to hide to elements from  the catalog form. which works only on the native view but not on the portal view. I want it to work on both views.

catalog client scirpt:

code:

function onLoad() {
    g_form.addInfoMessage('Script is working');
    var attr = document.getElementById("c7d47fcf1b9c1a54c9860d87dc4bcbffAdd").style.display='none';
    var attr2 = document.getElementById("482b9f031b581a54c9860d87dc4bcb48c7d47fcf1b9c1a54c9860d87dc4bcbffremoveAllRows").style.display='none';
    g_form.addInfoMessage(attr);
}