Working on dropdown list using jquery

Working on dropdown list using jquery

Hi All,

I have implemented asp.net dropdownlist and upon its selected index change event i am filling other drop down lists.
below is my code in which when i am passing value to this.val = '71' or any other integer value data is getting changed
however if i retrieve same value from database and passing to it to this.val = '71' data doesn't get changed in other drop down list...  Means selection index changed event does not occurr.

Why this is so ????
  1. $("#TEMPLATENAME1_dropdownlist_TEMPLATENAME1").combobox({selected: function(event, ui) {
             if ($(this).val() == '71') {
                 $("#Step_TN1_FIELD1").show('fast');
                 $("#title_TN1_FIELD1").text('Left View Field 1*: ');
                 $("#title_TN1_FIELD1").removeClass().addClass('MandatoryFldCaption');
                 $("#TN1_FIELD1_dropdownlist_TN1_FIELD1").removeClass().addClass('EnabledControl');
                 $("#FIELD1_dropdownlist_TN1_FIELD1").removeAttr("disabled");
    $("#TN1_FIELD1_dropdownlist_TN1_FIELD1").html("");