<style>
.file {
position: relative; direction:ltr; height:18px; overflow:hidden;
line-height: 18px; margin-right: 10px; padding:3px 0;
text-align: center; width:105px; background: #880000; color:#FFF;
}
.file input{
cursor: pointer; text-align: right; z-index: 10; font-size: 118px;
position: absolute; top: 0px; right:0px; opacity: 0; filter: Alpha(opacity:0);
}
</style>
<div class="file">
<input type="file" name="attach" />请选择文件
</div>
