参考网上写的客户端判断上传文件大小,opera无法支持
<!doctype html>
<html>
<head>
<meta charset = "gb2312" />
<script type="text/javascript">
function checkFileChange(obj) {
var filesize = 0;
if(navigator.userAgent.indexOf("MSIE")>0){ //if ie
var filePath = obj.value;
var image = document.getElementById("img");
image.dynsrc=filePath;
filesize=image.fileSize;
}
else // if chrome safari firefox
{
filesize = obj.files[0].fileSize;
}
alert(filesize);
}
</script>
</head>
<body>
<input type="file" id="myId" name="myId">
<input type="button" value="得到文件大小" onclick="checkFileChange(document.getElementById('myId'))">
<img id = "img" style = "display:none" />
</body>
</html>