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來源程式如下：
<html>
<head>
<title>
通過JAVASCRIPT檢查上傳檔案總大小（成功執行）
</title>
<script>
function checkFile()
{
var fso,file,f;
fso = new ActiveXObject("Scripting.FileSystemObject");
var totalSize;
totalSize=0;
var getFileNum=parseInt(document.getElementById("fileNum").value);
var i=1;
for(i=1;i<=getFileNum;i++)
{
file=document.getElementById("file"+i).value;
f=fso.GetFile(file);
//alert("檔案在大小："+f.size);
totalSize+=parseFloat(f.size);
}
alert("檔案在總大小："+totalSize);
return false;
}
//增加一個檔案
function addFile()
{
var upFile=window.uploadFiles.innerHTML;
var getFileNum=parseInt(document.getElementById("fileNum").value);
getFileNum=getFileNum+1;
var file="<br><input type='file' name='file"+getFileNum+"' id='file"+getFileNum+"'>";
window.uploadFiles.innerHTML=upFile+file;
document.getElementById("fileNum").value=getFileNum;
}
</script>
</head>
<body>
<form name="testForm" onsubmit="checkFile();">
<table>
<tr><td id="uploadFiles">
<input type="hidden" id="fileNum" value="1">
<input type="file" name="file1" id="file1"><input type=button value="增加檔案" onclick="addFile();">
</td></tr>
<tr><td>
<input type="submit" value="上傳檔案">
<tr><td>
</form>
</body>
</html>
本文出自：馮立彬的部落格
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