function tabit(tn) {
	var tabtotal = 0;
	var divCollection = document.getElementsByTagName("div");
	for (var i=0; i<divCollection.length; i++){	
		var divname = divCollection[i].getAttribute("id");
		if (divCollection[i].getAttribute("id") != null)
		{
			if(divname.indexOf('tabtrack') != -1){
					tabtotal=tabtotal+1;
			}
		}
	}
	for (var j=0; j < tabtotal; j++){
		document.getElementById("tabtrack"+j).className="tab-content-hide";
		document.getElementById("tm"+j).className="normal-tab";		
	}
	document.getElementById("tabtrack"+tn).className="tab-content";
	document.getElementById("tm"+tn).className="highlighted-tab";			
}