原生JavaScript写select下拉选择后跳转页面

 <select name="molsel_oprate" onchange="javascript:var obj = event.target; var index = obj.selectedIndex; $(this).val('default');var linkurl = obj.options[index].getAttribute('linkurl');if(index == 3){location.href=linkurl;}else{window.open(linkurl);}">

 <option value="default">操作选项</option>
  <option linkurl="aaa"> <span class="layui-icon" onclick="seledoplmki()">创建</span>
 </option>

  <option linkurl="bbb"> <span class="layui-icon" >修改</span>
 </option>

  <option linkurl="ccc" style="text-decoration:none"><span class="layui-icon">删除</span>
 </option>
 </select>

这个很简单，相信一看就看懂了，不解释了，做下笔记。