求救

运行起来没有显示成功或失败？  请大虾赐教！

<!--upload_file_post.php-->



<form enctype="multipart/form-data" action="receive_file_post.php" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="30000">
你的大名:<input type=text name=user><br>
上传文件:<input name=" userfile" type="file"><br><br>
<input type="submit" value="开始上传">
</form>



<!--receive_file_post.php-->



<?php
$upload_dir='.\\upload_files\\';
if (!move_uploaded_file($_FILES['userfile']['tmp_name'],$upload_dir.$_FILES['userfile']['name']))
echo"文件上传失败，错误信息：".$_FILES['userfile']['error']."<br>";
else
echo"文件".$_FILES['userfile']['name']."上传成功<br>";
?>