多个文件上传Jquery

I'm trying to make a multiple photo upload, but it doesn't. I used the input between <p></p> and now I made an ECHO in PHP with a table and put the input in a <tr><td>. I change the code in jQuery but it doesn't work anymore. Can someone help me?

This is the code:

jQuery:

    $(document).ready(function(){
   $('#add_more').click(function(){
       var current_count = $('input[type="file"]').length;
       var next_count = current_count + 1;

       $('#file_upload').prepend('<tr><td colspan="1">Fotka : </td><td colspan="2"><input type="file" name="file_' + next_count + '" /></td></tr>');
   });
});

And this is the PHP. I had to make ECHO because I'm making an administration and I'm using parameters.

    echo '  <tr><td colspan="1">Fotka : </td><td colspan="2"><input type="file" name="file_1"></td></tr>

No problem with PHP. Don't pay attention to the quotes. I closed them in another line. Thanks