var tempo = 1;
var pg = 0;
function muda_aba(){
	if(tempo >= 7){
		if(pg < 3){
			pg++;
			doClick(pg, 4, 'evento');
		}else{
			doClick(0, 4, 'evento');
		}
	}else{
		tempo++;
	}
	window.setTimeout('muda_aba()',1000);
}
function doClick(index,numTabs,id) {
	tempo = 1;
	pg = index;
	for (var j=0; j < numTabs; j++) {
		document.getElementById("taboff"+id+j).style.display = "none";
		document.getElementById("tab"+id+j).style.display = "none";
	}
	for (var j=0; j < numTabs; j++) {
		document.getElementById("taboff"+id+j).style.display = "block";
	}
	document.getElementById("taboff"+id+index).style.display = "none";
	document.getElementById("tab"+id+index).style.display = "block";
	document.getElementById("ev"+id+index).style.display = "block";
	for (var j=1; j < numTabs; j++) {
		document.getElementById("ev"+id+(index+j) % numTabs).style.display = "none";
	}
}