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5_class2.html
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5_class2.html
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<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta charset="utf-8">
<style>
.alert{
color:#922;
background:#fee;
}
.alert>.close{
float:right;
font-weight:bold;
opacity:.5;
cursor:pointer;
}
.alert>.close:hover{opacity:1}
.fade{ /*定义淡入淡出动画的初始状态,常驻元素*/
width:0px; height:100px;
position:fixed;
top:50%; left:50%;
margin-left:0px; margin-top:-50px;
opacity:0;
overflow:hidden;
transition:all .5s linear;
}
.in{ /*定义淡入淡出动画的结束状态*/
width:300px; height:100px;
position:fixed;
top:50%; left:50%;
margin-left:-150px; margin-top:-50px;
opacity:1;
}
</style>
</head>
<body>
<button id="btn">click me!</button>
<div class="alert fade">
<span class="close">×</span>
<p>您的浏览器版本太低!请下载最新版本的浏览器</p>
</div>
<script src="js/jquery-1.11.3.js"></script>
<script>
//当单击按钮时,显示对话框
$("#btn").click(function(){
$(".alert").addClass("in")
})
//当单击x时,隐藏x的父元素对话框
$(".close").click(function(){
$(this).parent().removeClass("in");
})
</script>
</body>
</html>