$(document).ready(function()
{
  $("span.on_img").mouseover(function ()
  {
    $(this).addClass("over_img");
  });

  $("span.on_img").mouseout(function ()
  {
    $(this).removeClass("over_img");
  });
});

$(function() {
$(".rating").click(function()
{
var photo_id = $(this).attr("photo_id");
var dataString = 'photo_id='+ photo_id ;
var parent = $(this);

$(this).fadeOut(300);
$.ajax({
type: "POST",
url: "ajax_vote.php",
data: dataString,
cache: false,

success: function(html)
{
var linkParent = parent.parent();
linkParent.html(html);
linkParent.fadeIn(300);
}
});

return false;

});
});