Hi i have following dropdown

<div class="fcolumn">
    <label class="text" for="o_Id">Months:</label>
    <select class="textMonths" id="o_Id" name="periodName" >
        <option value="000">Select Period--</option>
    </select>
</div> 

In the following jquery, first it loads fnLoadP() in a drop down list. Than as a default I am loading one of the values in drop down which is '10'. It loads too as default value. But it should be executing $("#o_Id").change.. which it doesn't.

$(document).ready(function () {
    var sProfileUserId = null;

    $("#o_Id").change(function () {
        //----
    });

    fnLoadP();

    $("select[name='pName']").val('10');      
});
});

Basically my goal is. After dropdown values are loaded, to load '10' as default value and call onchange event in the dom. Please let me know how to fix it.