<div class="select_box">

  <font>&#8250;</font>

  <span>选项1</span>

 <ul>

  <li>选项1</li>

  <li>选项2</li>

  <li>选项3</li>    

 </ul>

 </div> 

 

 <div class="select_box">

  <font>&#8250;</font>

  <span>选项一</span>

 <ul>

  <li>选项一</li>

  <li>选项二</li>

  <li>选项三</li>    

 </ul>

 </div>

ul{ margin:0; padding:0; list-style:none;}

.select_box{ width:200px; height:36px; border:1px solid #3CF; position:relative; float:left; margin-right:50px;}

.select_box span{ display:inline-block; width:200px; height:36px; line-height:36px; cursor:pointer; text-indent:10px;}

.select_box .span_aa{ color:#C36;}

.select_box ul{ width:200px; position:absolute; top:36px; left:-1px; border:1px solid #3CF; display:none; background:#fff;}

.select_box li{ cursor:pointer; line-height:36px; text-indent:10px;}

.select_box li:hover{ background:#39F; color:#fff;}

.select_box font{ position:absolute; right:10px; font-size:26px; font-family:"微软雅黑"; color:#3CF; transform:rotate(90deg);} 

$(function(){

  var s_title=$(".select_box span");

  var s_select=$(".select_box li");

 

  s_title.click(function(e){

   $(this).addClass("span_aa");

   $(this).next("ul").show();

   e.stopPropagation();

   });  

   

  s_select.click(function(){

   var s_text=$(this).html();

   var s_title_2=$(this).parent('ul').prev("span");

   s_title_2.html(s_text).removeClass("span_aa");

   $(this).parent('ul').hide();  

   });

   

  $(document).click(function(){

   s_title.removeClass("span_aa");

   $(".select_box ul").hide();  

   }); 

  

});