实现效果：
实现原理：
给关闭按钮绑定点击事件，点击以后触发动画效果。利用jQuery的animate方法，先让显示天气的盒子高度变为0，接着让整个包含天气和事件的盒子宽度变为0，最后通过将display属性值设为none，使得close按钮消失。
实现代码：
<!DOCTYPE html>
<html>
<head>
<title>仿360开机效果</title>
<meta charset="utf-8">
<style type="text/css">
*{
padding: 0;
margin: 0;
}
.box{
width: 320px;
position: fixed;
bottom: 0;
right: 0;
box-shadow: 1px 1px 10px #2d2d2d;
}
#close{
position: absolute;
top: 0;
right: 0;
width: 30px;
height: 20px;
cursor: pointer;
background-color: red;
color: pink;
font-weight: bold;
text-align: center;
}
.hd{
width: 320px;
height: 300px;
background-color: #03c03c;
color: #fff;
font-size: 70px;
line-height: 300px;
text-align: center;
}
.bd{
width: 320px;
height: 100px;
background-color: #fffc00;
font-size: 30px;
line-height: 100px;
text-align: center;
}
</style>
</head>
<body>
<div class="box">
<span id="close">X</span>
<div class="hd" id="t">1分12秒</div>
<div class="bd" id="b">天气：晴天</div>
</div> <!-- 引入jQuery -->
<script type="text/javascript" src="./jquery1.0.0.1.js"></script>
<script type="text/javascript">
window.onload = function(){
var close = document.getElementById("close");
var box = close.parentNode;
var b = document.getElementById("b"); // 给关闭按钮绑定点击事件
close.onclick = function(){
animate(b, {"height":0}, function(){
animate(box,{"width":0});
});
close.style.display = "none";
}
}
</script>
</body>
</html>