.vote .vote-no-bar {
display:none;
}
.vote {
width: auto;
}
.vote-button {
width: auto;
font-size: 0px;
}

<script type='text/javascript' charset='windows-1251'>
jQuery(document).ready(function(){
jQuery("div.vote-button
 a:contains('+')").append(jQuery('<img
src="http://i31.servimg.com/u/f31/11/61/12/59/11111110.gif"
 alt="Отлично!" Title="Отлично!">'));
jQuery("div.vote-button
a:contains('-')").append(jQuery('<img
src="http://i31.servimg.com/u/f31/11/61/12/59/22222210.gif" alt="Бесполезно" Title="Бесполезно">'));
});
</script>

https://i.servimg.com/u/f31/11/61/12/59/11111110.gif

https://i.servimg.com/u/f31/11/61/12/59/22222210.gif