JS前台动态无刷新绑定DropDownList

先调用后台Ajax方法获取返回的拼好的字符串

字符串的格式：var distValue =" text1 ,value1@text2,value2@text3";

 var distQL = distValue.split("@");
                   for (var i = 0; i < distQL.length; i++) {
                       var subItem = new Array();
                       subItem = distQL[i].split(",");
                       var text = subItem[0];
                       var value = subItem[1] ;

                     document.getElementById('ddlQL').add(new Option(text, value));//绑定DropDownList的value值，text值

                   }