Event.observe(window, 'load', tabShoppingLink, false);


function tabShoppingLink () {

var recentLink = 'http://www.midnightinaperfectworld.net/shopping/2010/02/000438.html';

var headerTab = $('gNav');
var headerShoppingTab = headerTab.getElementsByTagName('li')[1];
var headerShoppinglink = headerShoppingTab.getElementsByTagName('a')[0];
headerShoppinglink.href = recentLink;
}