<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script>
$(function() {
$('img').click(function() {
$(this).css({height:250, width:"auto"});
});
});
</script>
</head>
<body style="width: 400; height: ;">
<img src="http://cs306502.userapi.com/v306502055/5061/_7hhTxZUzkY.jpg" />
</body>
</html>
Работает?