<style type="text/css">
#logo a{
display: block;
width: 227px;
}
#logo img{width: 227px; height: 100px;}
</style>
<script>
var a=document.getElementById("logo").getElementsByTagName("a");
for(var i=0;i<a.length;i++){ a[i].setAttribute("id","gfx"); }
var dom = document.getElementById('gfx');
var timer = null; dom.onmouseover = function(){
var num = 0; clearInterval(timer);
timer = setInterval(function(){
dom.style.webkitMask = '-webkit-gradient(radial, 100 50, '+num+', 100 50, '+(num+20)+', from(rgb(0, 0, 0)), color-stop(0.5, rgba(0, 0, 0, 0.1)), to(rgb(0, 0, 0)))';
num+=1;
num = num > 200?0 : num;
}, 227/100);
};
dom.onmouseout = function(){
clearInterval(timer);
dom.style.webkitMask = '';
}
</script>