<script src="http://code.jquery.com/jquery-latest.js"></script>
<style>#a1,#b1,#a2{display:none;}</style>
<div id="a1">slm</div>
<div id="b1">merhaba</div>
<div id="a2">nbaer</div>
<script type="text/javascript">
$(document).ready(function(){
setTimeout(function() {$('#a1').show();},1000);
setTimeout(function() {$('#b1').show();},3000);
setTimeout(function() {$('#a2').show();},5000);
});
</script>