json - Jquery .change function is not working through javascript -


.change call in jquery not working when change value through javascript.

for example: 

 $(document).ready(function () {      $(function () {          $("select#product").change(function () {              if (document.all("fatcasearchdo.bankid").disabled.value = true) {                  fnfieldenableclass(document.all("fatcasearchdo.bankid"));              }              $.ajax({                  type: 'get',                  url: 'viewhistorydataaction.do',                  data: {                      product: $(this).val()                  },                  datatype: 'json',                  cache: false,                  success: function (j) {                      var options = '';                      (var k = 0; k < j.length; k++) {                          options += '<option value="' + j[k] + '">' + j[k] + '</option>';                      }                      $("select#bankid").html(options);                  }              });          });      });  });     <html:select name="viewhistoryform" property="fatcasearchdo.bankid" styleclass="login-textbox" onchange="fnglobalchange();" onclick="checkradio('1')" onfocus = "checkradio('1')" styleid="bankid" style="width=250">  <html:select name="viewhistoryform" property="fatcasearchdo.product" styleclass="login-textbox" onchange="fnglobalchange();" onclick="checkradio('1')" onfocus = "checkradio('1')" styleid="product" style="width=250">

here when try change drop down of "product" calling action , respective bank id values populated. now, when try change value of "product" through javascript, instance

<input type="button" onclick="changeprod()">  function changeprod(){     document.all("fatcasearchdo.product").value='cc';  }

the change function not working.

when change value of input field through javascript, change event not fired.

you need fire change event manually

like

$("#fatcasearchdo.product").trigger('change')

ex:

function changeprod(){     $("#fatcasearchdo.product").val('cc').trigger('change'); }

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