index.phtml #1

<div class="splash">
 <a href="<?=$this->startUrl?>"><img src="<?=$this->module('setup')->getBaseUrl()?>/images/splash.png"></a>
</div>
<script type="text/javascript">
    dojo.addOnLoad(function() {
        dojo.connect(dojo.body(), 'onkeydown', function(e) {
            var event = e ? e : event;
            var key = event.keyCode;
            if (key == 13) {
                window.location = dojo.query('div.splash a')[0].href;
            }
        });
    });
</script>