var tiPage;
var tiTimer;
function tiNext () {
   document.getElementById("tiPage"+tiPage).style.display = "none";
   if (tiPage<2) {tiPage += 1;} else {tiPage=1};
   document.getElementById("tiPage"+tiPage).style.display = "block";
}
function tiPrev () {
   document.getElementById("tiPage"+tiPage).style.display = "none";
   if (tiPage>1) {tiPage -= 1;} else {tiPage=2};
   document.getElementById("tiPage"+tiPage).style.display = "block";
}
function tiPause () {
clearInterval(tiTimer);
}

function tiStart() {
tiTimer = setInterval("tiNext();",5000);
}
tiPage = 1;
window.onload = function () {
    tiStart();
}