<!DOCTYPE html>
<html>
<head>
<script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
<script>
$(document).ready(function(){ $("#flip").click(function(){ $("#panel").slideDown(5000); });
$("#stop").click(function(){ $("#panel").stop(); });
});
</script>
<style>
#panel, #flip { padding: 5px;
font-size: 18px;
text-align: center;
background-color: #555;
color: white;
border: solid 1px #666;
border-radius: 3px;
}
#panel { padding: 50px;
display: none;
}
</style>
</head>
<body>
<button id="stop">Stop sliding</button>
<div id="flip">Click to slide down panel</div>
<div id="panel">Hello world!</div>
</body>
</html>