var keepRollingTab=true;
var startedRollingTab=false;
var currentTab=0;

function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/-/g, "\-");
	var oRegExp = new RegExp("(^|\s)" + strClassName + "(\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}


function switchTab(showTab, keepGoing) { 
	var arrElements = getElementsByClassName(document.getElementById("tabSet"), "div", "tab");
	if(!keepGoing){
		keepRollingTab = false;
	}
	for (var i=0;i<arrElements.length;i++) {
		arrElements[i].style.display = "none";
	} // Closes any open tabs.

	var arrTabs = document.getElementById("navTabs").getElementsByTagName("li");
	for (var i=0;i<arrTabs.length;i++) {
		arrTabs[i].className = "";
	} // Clear any 'current' tabs.
	
	document.getElementById(showTab).style.display = ""; // Open the desired tab.
	
	document.getElementById(showTab + '_link').className='current';// Write a class of 'current' to the containing element.
}

function rollTab(){

	if(keepRollingTab){

		if(startedRollingTab){	
			if(currentTab < (4)){
				currentTab++;
			} else {
				currentTab=0;
			}
			if(currentTab == 0){
				switchTab('tabPeople', true);
			} else if(currentTab == 1){
				switchTab('tabPlaces', true);
			} else if(currentTab == 2){
				switchTab('tabGroups', true);
			} else if(currentTab == 3){
				switchTab('tabProducts', true);
			} else if(currentTab == 4){
				switchTab('tabNewBiters', true);
			}
			
		}

		startedRollingTab=true;
		var t=setTimeout("rollTab();",6500);
	}
}

addLoadEvent(function(){
	rollTab();
});