function changeCSS(nr)
{
	if (document.getElementsByTagName)
		x = document.getElementsByTagName('link');
		
	if (document.all)
		x = document.all.tags('link');

	nr--;
	for (var i=0;i<x.length;i++)
	{
		dis = !(i == nr);
		x[i].disabled = dis;
	}
}