代码如下:


<style> 
.fileInputContainer{ 
height:256px; 
background:url(upfile.png); 
position:relative; 
width: 256px; 

.fileInput{ 
height:256px; 
overflow: hidden; 
font-size: 300px; 
position:absolute; 
right:0; 
top:0; 
opacity: 0; 
filter:alpha(opacity=0); 
cursor:pointer; 

</style> 
<div class="fileInputContainer"> 
<input class="fileInput" type="file" name="" id="" /> 
</div>