AJAX 动态加载后台数据 绑定select的方法

<select id="select" style="width : 80px;height : 30px;">  //下拉框数据动态加载</select>

$.ajax({    url: "",  //后台webservice里的方法名称   contentType: "application/json; charset=utf-8",    type: "get",   async : true ,  dataType: "json",   success: function (date) {     var optionstring = "";    for (var j = 0; j < date.length;j++) {           optionstring += "<option value=/"" + date[j].id + "/" >" +"睡眠次数："+date[j].limitnumber+"  睡眠时间："+date[j].sleeptime + "</option>";     $("#select").html("<option value='0'>请选择...</option> "+optionstring);          }         },         error: function (msg) {           alert("出错了！");         }       });