function populateDropDown() { $.getJSON('/getData.aspx',{Name:$('#parm').val()},function(data){  var select = $('#DDLControl');  var options = select.attr('options');  $('option', select).remove();   $.each(data, function(index, array) {   options[options.length] = new Option(array['variety']);  }); });} $(document).ready(function() { populateDropDown(); $('#DDLchangeData').change(function() {  populateDropDown(); });});