function setTab (curTabIndex, nextTab) {
	
	if(typeof(_NUMTABS)=='undefined') return;
	//alert(_NUMTABS);
	if (nextTab > _NUMTABS) {
		nextTab = 1;
	} 
	
	var objCurrentTab = document.getElementById('promo' + curTabIndex);
	if(objCurrentTab) objCurrentTab.className = 'off';
	
	var objNewTab = document.getElementById('promo' + nextTab);
	if(objNewTab)
	{
		objNewTab.className = 'on';
	
		// Submit to google analytics
		_gaq.push(['_trackPageview', '/hometabs/'+objNewTab.id]);
	}
	
	currentTab = nextTab;
	
}