Miscellany

<form name="upload_form" action="upload.php" target="upload_frame" onsubmit="javascript:alert('test');" method="post" enctype="multipart/form-data">
    <input type="file" value="/test" name="photos" />
    <input type="button" onclick="javascript:document.forms.upload_form.submit();" value="{#advimage_dlg.submit}" />
</form>