i = new Image;
i.src = 'images/who-s.gif';
i.src = 'images/new-s.gif';
i.src = 'images/functional-s.gif';
i.src = 'images/else-s.gif';
i.src = 'images/contact-s.gif';
i.src = 'images/email-s.gif';
i.src = 'images/h-home-s.gif';
i.src = 'images/back-s.gif';

function roll(o,s)
{
	if (s)
		o.firstChild.src = o.firstChild.src.replace("-u","-s");
	else
		o.firstChild.src = o.firstChild.src.replace("-s","-u");
}