<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("#start").click(function(){
var div = $("div");
div.animate({height:300},"slow");
div.animate({width:300},"slow");
div.queue(function () {
div.css("background-color","red");
div.dequeue();
});
div.animate({height:100},"slow");
div.animate({width:100},"slow");
});
});
</script>
</head>
<body>
<p>The queue() method allows you to create a queue of functions to be executed on selected elements.</p>
<p>The dequeue() method executes them in order. </p>
<p><button id="start">Start Animation</button></p>
<div style="background:blue;height:100px;width:100px;">
</div>
</body>
</html>