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Check drop down list value

Check drop down list value

Check drop down list value

(OP)
I want to check the value of a drop down list and if the value is "" or NO throw a message and do not continue to open the popup window.. If it's value is YES then open the window. I'm passing a value from one form to another and want to add that check before opening the second window.

I'm opening the window using the following;

<script type="text/javascript">

function openRadWindow() {
var value = '<%= l2.Text %>';

var oWnd = radopen("MyForm.aspx?ID=" + value, "UserListDialog");
oWnd.center();
}
</script>

any help would be appreciated

Thanks

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