function tabClick(tab) {

	if (tab.id == 'overview') {
		tab.className = 'productmenuitem sel';
		document.getElementById('specs').className = 'productmenuitem notsel';
		document.getElementById('overviewcontent').style.display = 'inline';
		document.getElementById('specscontent').style.display = 'none';
	}
	else {
		tab.className = 'productmenuitem sel';
		document.getElementById('overview').className = 'productmenuitem notsel';
		document.getElementById('overviewcontent').style.display = 'none';
		document.getElementById('specscontent').style.display = 'inline';
	}

}