Question

有人可以發現此代碼中的錯誤，它不顯示上傳進度。

<form action="upload.php" method="post" enctype="multipart/form-data"> 
<center><p> <input type='file' id='upload_id' size='58' style='height: 30px; font-size: 18px' name='filename'></p> 
<input type='image' src='<?php echo $menu_upload_button; ?>' onclick="function set() { f=document.getElementById('progress_iframe'); f.style.display='block'; f.src='uploadprogress.php?id=<?=$upload_id?>';} setTimeout(set);"> 
<iframe id="progress_iframe" src="" style="display:none;" scrolling="no" frameborder="0"></iframe> 
</form> 

從輸入的功能是這樣的：

function set() { 
    f=document.getElementById('progress_iframe'); 
    f.style.display='block'; 
    f.src='uploadprogress.php?id=<?=$upload_id?>'; 
} 
setTimeout(set); 

uploadprogress.php：

<META HTTP-EQUIV='REFRESH' CONTENT='1;URL=?id=<?=$_GET['id']?>'> 
Upload progress:<br /> 
<?php 
    if(!$_GET['id']) die; 
    $info = uploadprogress_get_info($_GET['id']); 
    $kbytes_total = round($info['bytes_total']/1024); 
    $kbytes_uploaded = round($info['bytes_uploaded']/1024); 
    echo $kbytes_uploaded.'/'.$kbytes_total.' KB'; 
?> 

謝謝。

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