下拉框select样式改写具体实现

<style> 
.select { width:168px; height:16px; background:none; border:none; } 
#sleHid { display:block; width:143px; overflow:hidden; } 
#sleBG { width:168px; height:16px; border: 1px solid #A3938C; background:url("icon3.jpg") #fff no-repeat 151px 0px; display:block;} 
</style> 
<div> 
<form> 
<span id="sleBG"> 
<span id="sleHid"> 
<select name="type" class="select"> 
<option selected="selected">所有分类</option> 
<option value="1">图书</option> 
<option value="2">音像</option> 
</select> 
</span> 
</span> 
</form> 
</div>