<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
var div = $("div");
$("#start").click(function(){
div.animate({height:300},"slow");
div.animate({width:300},"slow");
div.animate({height:100},"slow");
div.animate({width:100},"slow");
});
$("#stop").click(function(){
div.stop(true);
});
});
</script>
</head>
<body>
<p>
<button id="start">Start Animation</button>
<button id="stop">Stop All Queued Animations</button>
</p>
<div style="background:#98bf21;height:100px;width:100px">
</div>
</body>
</html>