function activateSection(sender)
{
	var DIVs = document.getElementsByTagName('DIV');

	for (i=0;i<DIVs.length;i++)
		if (DIVs[i].className == 'nav-section-active')
			DIVs[i].className = 'nav-section';

	sender.className = "nav-section-active";
}

function highlight(sender, img)
{
	sender.style.backgroundImage = 'url(img/' + img + ')'; 
}
function normal(sender, img)
{
	sender.style.backgroundImage = 'url(img/' + img + ')'; 
}