代码如下：
在ie下，貌似要改安全设置中的【对为标记为可安全执行脚本的ActiveX空间初始化并执行】那项
<html>
<head>
<script type="text/javascript">
var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
function fileChange(target) {
var fileSize = 0;
if (isIE && !target.files) {
var filePath = target.value;
var fileSystem = new ActiveXObject("Scripting.FileSystemObject");
var file = fileSystem.GetFile (filePath);
fileSize = file.Size;
} else {
fileSize = target.files[0].size;
}
alert(“文件字节大小:”+fileSize);
var size = fileSize / 1024;
if(size>10000){
alert("附件不能大于10M");
}
}
</script>
</head>
<body>