<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>夜间模式</title> <script> function mySwitch() { var oBody = document.getElementById("mybody"); var oOnoff = document.getElementById("myonoff"); if (oOnoff.src.match("bulbon")) { oOnoff.src = "http://www.runoob.com/images/pic_bulboff.gif"; oBody.style.background = "black"; oBody.style.color = "yellow" } else { oOnoff.src = "http://www.runoob.com/images/pic_bulbon.gif"; oBody.style.background = "white"; oBody.style.color = "black" } } </script> </head> <body id="mybody"> <img id="myonoff" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" width="40px"> <script> document.write(Date()) </script> </body> </html>
2.
css
img { width: 400px; } div.sa { border-style: solid; border-width: 5px; border-color: red; width: 400px; float: left; margin: 5px; } div.sa img { width: 100%; heigh: aute; } div.st { text-align: center; padding: 2px; } div.sa:hover { border-style: solid; border-width: 5px; border-color: green; }
js
function mySwitch() { var oBody = document.getElementById("mybody"); var oOnoff = document.getElementById("myonoff"); if (oOnoff.src.match("bulbon")) { oOnoff.src = "http://www.runoob.com/images/pic_bulboff.gif"; oBody.style.background = "black"; oBody.style.color = "yellow" } else { oOnoff.src = "http://www.runoob.com/images/pic_bulbon.gif"; oBody.style.background = "white"; oBody.style.color = "black" } }
html文件:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Bootstrap 实例 - 倒置的导航栏</title>
<link rel="stylesheet" type="text/css" href="../static/css/lin.css">
<link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="../static/js/daohang.js"></script>
</head>
<body id="mybody">
<nav class="navbar navbar-inverse" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="#">首页</a>
</div>
<div>
<ul class="nav navbar-nav">
<li><a href="#" onclick="">登陆</a></li>
<li><a href="#" onclick="">注册</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
设置 <b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#">收藏</a></li>
<li><a href="#">分享</a></li>
<li><a href="#">搜索</a></li>
<li class="divider"></li>
<li><a href="#">点赞</a></li>
</ul>
</li>
<li><a href="#">||</a></li>
</ul>
</div>
<div style="float: left">
<img id="myonoff" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" style="width:40px" >
</div>
<div>
<input type="text" name="user" id="user" placeholder="请输入内容">
<input type="button" value="搜索" class="btn btn-success" onclick="">
</div>
</div>
</nav>
<nav class="navbar navbar-inverse navbar-fixed-bottom" role="navigation">
<ul class="nav navbar-nav">
<li><img src="http://www.gzcc.cn/2016/images/footer1-logo.png"></li>
<li style="color: bisque;">版权所有@jk</li>
</ul>
</nav>
<script>
document.write(Date())
</script>
<div>
<div class="sa">
<a href="http://desk.zol.com.cn/"><img
src="http://pic7.photophoto.cn/20080529/0034034465128235_b.jpg"></a>
<div class="st"><a href="http://desk.zol.com.cn/">tu1</a></div>
</div>
<div class="sa">
<a href="http://desk.zol.com.cn/"><img
src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1509638428671&di=7266e0025649123b4c4cde79925c26b3&imgtype=0&src=http%3A%2F%2Fpic38.nipic.com%2F20140228%2F3822951_135521683000_2.jpg"></a>
<div class="st"><a href="http://desk.zol.com.cn/">tu2</a></div>
</div>
</div>
</body>
</html>
原文:http://www.cnblogs.com/lzp963/p/7774554.html