[HTML][CSS] How to solve html [type=file] can't work

[HTML][CSS] How to solve html [type=file] can't work

CSS:

<style type="text/css">

<!--

 .ifile {  

    position: absolute;  

    height: 25px;

    width: 90px;  

    left:20px;

    opacity: 0;  

    filter: alpha(opacity = 1);  

    z-index: 2;

    cursor: none;

    border-width: 100px;

}

-->

</style>

HTML :

<input type="FILE" name="restoreFilename" size="20" maxlength="128" class="ifile" onchange="funcBackup();" hidefocus>

<button class="upc_button4 width150" type="button" value="Select File"  hidefocus><span>Select File</span></button>

<input type="text" name="upfile" size="20" readonly>

Reference :

1. 
   螞蟻的 CSS


2. 
   自定义上传控件input file的样式


3. 
   CSS教學-關於DIV的POSITION設定


4. 
   Hidefocus attribute


5. 
   HTML Button Border