I have a dropdown field which is a lookup containing values. I need to get the ID of the selected value whenever we change. I tried using the following. I didnt get any response

$ (document).ready(function(){

$("#ctl00_m_g_8c84c77a_5db3_4a23_9869_d6079afd3bd5_ctl00_ctl05_ctl01_ctl00_ctl00_ctl04_ctl00_Lookup").change(function() { alert("hi"); var id = $(this).find('option:selected').attr('id'); });

alert(id); });

2 Answers 2


The ID of the control will differ, try to use $("[id$='Lookup']") to get an element ending with "Lookup".

Then you can use .val() to get the selected value of the dropdown: var id= $("[id$='Lookup']").val();

  • thnks for the info
    – Arul
    Jul 15, 2013 at 8:22
  • So, did it work or not? :P Jul 15, 2013 at 8:53
  • Then please please mark it as an answer Jul 15, 2013 at 10:33

That's correct as suggested by Robert. But just in case, if there are more than one look up columns add an extra filter as shown in the below script

<script type="text/javascript">
    $(document).ready(function () {
        if ($("[id$='_Lookup'][title='<<FieldName>>']").length > 0) {
            $("[id$='_Lookup'][title='<<FieldName>>']").change(function () {

Replace <<FieldName>> with your Field Title.

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