cahnge div content sample 1
HTML
<div id="contentA" style="display:none">
contentA
</div>
<div id="contentB" style="display:none">
contentB
</div>
<div id="displayArea">
<!-- switch between contentA and contentB on a timer say every 5 seconds -->
</div>
JavaScript
var toggle = false;
$("#displayArea").html($("#contentA").html());
setInterval(function() {
$("#displayArea").html(toggle ? $("#contentA").html() : $("#contentB").html());
toggle = !toggle;
}, 5000);