例子如下:

<html>
<head>
    
<title>File Upload Example</title>
    
<script language="JavaScript" type="text/javascript">
    
function HandleFileButtonClick()
    {
        document.frmUpload.myFile.click();
        document.frmUpload.txtFakeText.value 
= document.frmUpload.myFile.value;
    }
    
</script>
</head>
<body>
  
<form name="frmUpload">
    
<input type="file" name="myFile" style="display: none">
    
<input type="text" name="txtFakeText" readonly="true">
    
<input type="button" onclick="HandleFileButtonClick();" value="上传文件" style="background:red">
  
</form>
</body>
</html>

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