<script type="text/javascript">
$(function(){
        var btnUpload=$('#upl');
        var status=$('#statu');
        new AjaxUpload(btnUpload, {
            action: 'upload-file.php',
            name: 'uploadfile',
            onsubmit: function(file, ext){
                if (! (ext && /^(zip|rar|7z|gz)$/.test(ext))){ 
                    // extension is not allowed 
                    status.text('Запрещенный формат');
                    return false;
                }
                status.text('Uploading...');
            },
            onComplete: function(file, response){
                //On completion clear the status
                status.text('');
                //Add uploaded file to list
                if(response==="success"){
                    $('<p></p>').appendTo('#fil').html('[attachment=209:'+file+"]").addClass('success');
                } else{
                    $('<li></li>').appendTo('#fil').text(file).addClass('error');
                }
            }
        });
        
});
</script>   
<div id="mainbody"><div id="upl">Обзор</div></div>