how to attach image in ajax link

<?=$ajax->link(($html->image("like",array('escape'=>false))),'/user_articles/vote/up/'.$article['Article']['id'],array('update'=>'vote_'.$article['Article']['id']),null,false);?>
out put
<img src="/cakeplate/img/like" alt="" />
before ask
I try to find answer in group and follow it but doesn't work
how to fix it

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