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(); });});希望本文所述对大家的jQuery程序设计有所帮助。