APEX

Hello,

I am trying to follow how to do multiple values from popup lov using the following
http://apex.oracle.com/pls/otn/f?p=56976:13:2328875764224889::NO

In step 2 it is mentioned that

In the page definition, add the following into the Execute when Page Loads setting:
$(document).ready(function() {
$("#P13_EMPNO").bind("change", function()
{
 getEmployeeInfo($("#P13_EMPNO_HIDDENVALUE").val());
});
});

Where exactly I need to add the above code, I am not sure where is Execute when Page Loads.
Could someone kindly provide some insight?

Any help is highly appreciated.

Thanks