<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js"></script>
</head>
<body>
<style>
div {width: 100px;height: 100px;}
#div1 {background: red;}
#div2 {background: yellow;}
#div3 {background: brown;}
#div4 {background: green;}
#div5 {background: blue;display: none;}
</style>
<div id="div1"></div>
<div id="div2"></div>
<div id="div3"></div>
<div id="div4"></div>
<div id="div5"></div>
<script>
$.when(
$('#div1').hide(1200),
$('#div2').hide(500),
$('#div3').hide(2500),
$('#div4').hide(1800)
).done(function() {$('#div5').show(1000)});
</script>
</body>
</html>