$(document).ready(function(){

$("a[href$=jpg]:has(img)").attr('onClick',"return hs.expand(this);");
$("a[href$=gif]:has(img)").attr('onClick',"return hs.expand(this);");
$("a[href$=png]:has(img)").attr('onClick',"return hs.expand(this);");
$("a[href$=jpeg]:has(img)").attr('onClick',"return hs.expand(this);");



});