Interesting Javascripting

<script type="text/javascript">



var x = location.search;

var y =new Array();



y = x.split('&');

w = y[0].split('=');

myusername = w[1];

document.write(myusername)

</script>

Try it by using this link:http://killyandfriends.blogspot.com/?function=Hello%20World!