Get ID of Dropdown list inside update panal.

Hi All,
Dropdown list change function is not working when drop down list is inside update panal.
How i can get id of drop down list inside update panal. And how i can call $("select[Id*=ddlSelectSub]").change(function ()
for ddlSelectSub drop downlist which is inside update panel.

I am able to call $("select[Id*=ddlSelectSub]").change(function () { when it is not inside update panel.


Thanks.

Pallavi