兼容ie select option 显示隐藏

<select name="fatherselect" id="fatherselect" class="sps-ui-select fathercategory">
    <option data-categoryid="" name="fatherfirst" value="">一级分类</option>
    <option value="" data-categoryid="1">五险一金</option>
    <option value="" data-categoryid="2">企业服务</option>
    <option value="" data-categoryid="3">员工服务</option>
</select>

<select name="childselect" id="childselect" class="sps-ui-select"><span style="white-space:pre">	</span><option pid="" data-categoryid="" name="childfirst" value="">二级分类</option><span style="white-space:pre">	</span><option value="" class="pid pid1" data-categoryid="5" style="display: none;">社会保险服务</option><span style="white-space:pre">	</span><option value="" class="pid pid1" data-categoryid="6" style="display: none;">公积金服务</option><span style="white-space:pre">	</span><option value="" class="pid pid2" data-categoryid="7" style="display: none;">社保账户服务</option><span style="white-space:pre">	</span><option value="" class="pid pid2" data-categoryid="8" style="display: none;">公积金账户服务</option><span style="white-space:pre">	</span><option value="" class="pid pid3" data-categoryid="9" style="">社保日常服务</option><span style="white-space:pre">	</span><option value="" class="pid pid3" data-categoryid="10" style="">公积金日常服务</option></select>

//将option序列到数组中

var childselectAry = $("#childselect option.pid").map(function(){return $(this).context.outerHTML}).get();

//父级变化触发事件

$("#fatherselect").on("change",function () {

   $father = $("#fatherselect").find("option:selected");   if($father.attr("data-categoryId") != ""){

//标准浏览器处理方法      $("#childselect option[name='childfirst']").show();      $("#childselect").removeAttr("disabled");      var pid = $father.attr("data-categoryId");      $("#childselect option.pid").hide();      $("#childselect option.pid" + pid).show();

//ie8浏览器处理方法

if( isIE ){  

 $("#childselect option.pid").remove()         

 for (key in childselectAry){            

 if(childselectAry[key].indexOf("pid"+pid)> -1){               

 $("#childselect").append(childselectAry[key])            

		}         

	}

   }else{

//父级选中默认选项操作      $("#childselect option.pid").hide();      $("#childselect option[name='childfirst']").prop("selected", true);      $("#childselect").attr("disabled","true");   }})

function isIE() { //ie?      if (!!window.ActiveXObject || "ActiveXObject" in window)          return true;      else          return false;  }