不刷新提交 file 表单，实则是通过 iframe 来实现的：
test.html 代码：
<html> <head> <script type="text/javascript"> function test(msg){ alert(msg); } </script> </head> <body> <form action="test.php" enctype="multipart/form-data" method="post" target='hidden_iframe'> <input type="file" id="file" name="file" /> <input type="submit" value="submit" />
</form>
<iframe name="hidden_iframe" id="hidden_iframe" style="display:none;" ></iframe> </body>
</html>
test.php 代码：
<?php ... code goes here ... echo "<script type='text/javascript'>parent.test('some messages');</script>"; ?>