var currentTab = 1;
var _NUMTABS = 4;



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