CATS.html

<style>
    #browser { padding: 20px; }
    img { width: 100px; height: 100px; float: left; }
</style>

<h1>THE CATS</h1>

<button>Pls give me a cat</button>

<div id="cats"></div>

<script>
    var catURL = 'http://thecatapi.com/api/images/get?format=src&type=gif';
    $('button').click(function() {
        $('#cats').append(
            $('<img/>').attr('src', catURL + '&' + new Date().getTime())
        );
    })
</script>