1         function load(mslt_employees,belongto,mark) {//传入$(#ID) 2             var jsondata =http://www.mamicode.com/ JSON.stringify({ belongto: 1, username: username }); 3             var emp = null; 4             jQuery.ajax({ 5                 type: ‘POST‘, 6                 url: "../tools/employees_ajax.ashx?action=" + action + "", 7                 dataType: "json",//返回JSON对象 8                 data:jsondata,//上传JSON格式的参数 9                 cache: false,10                 async:false,//异步执行11                 success: function (message) {12                     mslt_employees.empty();//清空下拉标签13                     if (message != "0" && message != "none") {14                         var list = message;15                         for (var i = 0; i < list.length; i++) {16                             if (mark == 1) {17                                 if (belongto != 1) {//设置默认选项18                                     mslt_employees.append($("<option value=http://www.mamicode.com/‘" + list[i].USERNAME + "‘ disabled = ‘disabled‘>" + list[i].USERNAME + "</option>"));19                                 } else {20                                     mslt_employees.append($("<option value=http://www.mamicode.com/‘" + list[i].USERNAME + "‘>" + list[i].USERNAME + "</option>"));21                                 }22                             } else {23                                 mslt_employees.append($("<option value=http://www.mamicode.com/‘" + list[i].USERNAME + "‘>" + list[i].USERNAME + "</option>"));24                             }25                             if (i == 0) { emp = list[i].USERNAME; } else {26                                 emp = emp + "," + list[i].USERNAME;27                             }28                         }29                     }30                     mslt_employees.multiselect(‘refresh‘);//刷新多选下拉标签31                 }, error: function () { return null; }32             });33             return emp;//返回值34         }

原文出处：http://www.cnblogs.com/OnlyDreams/p/4143515.html
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