夜间模式的开启与关闭，父模板的制作

  1. 夜间模式的开启与关闭
    1. 放置点击的按钮或图片。
    2. 定义开关切换函数。
    3. onclick函数调用。
  2. 父模板的制作
    1. 制作网站网页共有元素的父模板html，包括顶部导航，中间区块划分，底部导航，底部说明等。
    2. 汇总相关的样式形成独立的css文件。
    3. 汇总相关的js代码形成独立的js文件。
    4. 形成完整的base.html+css+js

1.代码如下：

light1.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
 <script language="javascript" type="text/javascript" src="../static/js/light1.js"></script>
</head>
<body id="myBody">
<img id="myOnOff" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" width="40px">
<script>

    document.write("点击有惊喜!&nbsp Now is&nbsp")
     document.write(Date())
</script>
<img id="gui" onclick="mySwitch()" src="" width="1400px">




</body>
</html>

light1.js

function mySwitch() {
    var oBody = document.getElementById("myBody");
    var oOnOff = document.getElementById("myOnOff");
    var ogui = document.getElementById("gui");
    if (oOnOff.src.match('bulbon')) {

        oOnOff.src = "http://www.runoob.com/images/pic_bulboff.gif";
        oBody.style.backgroundColor = "black";
        oBody.style.color = "white";
        ogui.src = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1509563443074&di=b1bbb3f5714a580e2211e281124636c2&imgtype=0&src=http%3A%2F%2Fpic15.nipic.com%2F20110709%2F7854247_221301558161_2.jpg";
    } else {
        oOnOff.src = "http://www.runoob.com/images/pic_bulbon.gif";
        oBody.style.backgroundColor = "white";
        oBody.style.color = "black";
        ogui.src = "";

    }
}

运行结果：

 

2.a

代码如下：

basic.html

<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8">
   <title>请不要关灯</title>
     <script language="javascript" type="text/javascript" src="../static/js/basic.js"></script>
    <link rel="stylesheet" type="text/css" href="../static/css/basic.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>
</head>
<body  id="myBody" background="../static/img/timg1.jpg">


<ul class="nav nav-pills">
   <li class="active"><a href="#"><h2>Home</h2></a></li>
   <li><a href="#"><h2>PHP</h2></a></li>
   <li><a href="#"><h2>JAVA</h2></a></li>
   <li><a href="#"><h2>C++</h2></a></li>
   <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#">
         <h2>更多</h2><span class="caret"></span>
      </a>
      <ul class="dropdown-menu">
         <li><a href="#"><h2>python</h2></a></li>
         <li><a href="#"><h2>html</h2></a></li>
         <li><a href="#"><h2>jsp</h2></a></li>

      </ul>
   </li>
<li><a href="#"><h2>......&nbsp</h2></a></li>
<li>
     <input class="d1" type="text" placeholder="搜索从这里开始...">
     <button  class="b" type="submit">搜索</button></li>

    <li><img id="myOnOff" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" width="40px">&nbsp;</li>
    <li><a href="../templates/login.html"><h2>登录</h2></a></li>
    <li><a href="../templates/zhuce.html"><h2>注册</h2></a></li>
    <li><a href="#"><h2>联系我</h2></a></li>
</ul>


<img id="gui" onclick="mySwitch()" src="" width="1700px">

<div class="n1">
    <h2>内容块1</h2>
</div >
<div class="n2">
    <h2>内容块2</h2>
</div>



<div id="didao">

    <div class="img"><a href="http://www.baidu.com"><img src="http://scimg.jb51.net/allimg/140408/10-14040QG01GU.jpg"></a><div class="desc"></div><a href="http://www.baidu.com">友情链接</a></div>
    <div class="img"><a href="http://www.baidu.com"><img src="http://imgstore.cdn.sogou.com/app/a/100540002/800197.jpg"></a><div class="desc"></div><a href="http://www.baidu.com">教务系统</a></div>
    <div class="img"><a href="http://www.baidu.com"><img src="http://4493bz.1985t.com/uploads/allimg/150625/1-1506251F320.jpg"></a><div class="desc"></div><a href="http://www.baidu.com">读者留言</a></div>
    <div class="img"><a href="http://www.baidu.com"><img src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1510223061&di=bc9ea322068f5f0311fb2ab6fe9db29a&imgtype=jpg&er=1&src=http%3A%2F%2Fwww.005.tv%2Fuploads%2Fallimg%2F160920%2F103J12649-15.jpg"></a><div class="desc"></div><a href="http://www.baidu.com">回到顶部</a></div>

</div>



<footer>
    <div class="foot">
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    </div>
</footer>
</body>
</html>

basic.css

/*.mao{*/
    /*background-image:url(../../static/img/timg9.jpg)*/

/*}*/
#myBody{
    background-size: auto 1021px;
}
#myOnOff{
    margin-left: 600px;
}
.b{
    margin-top: 10px;
  position: absolute;
  top: 0;
  right: 0px;
   58px;
  height: 58px;
  border: none;
  background: rgba(122, 162, 215, 0.55);
  border-radius: 0 5px 5px 0;
  cursor: pointer;

}
.d1{
     margin-top: 10px;

      100%;
  height: 58px;
  padding-left: 10px;
  border: 2px solid #e7e4e4;
  border-radius: 5px;
  outline: none;
  background: rgba(231, 228, 228, 0.37);
  color: #e7e4e4;
}
.foot{
    position: absolute;
    bottom: 0px;
    margin: 10px;
    100%;
    text-align: center;
    color: rgba(58, 40, 66, 0.41);
}


#didao{
      position: absolute;
    bottom: 50px;
    margin: 10px;
    100%;
    text-align: center;
}

div.img{


    border:1px solid #ccc;
     300px;

    float:left;
    margin: 5px;
}
div.img img{
     200px;
    height: 135px;

}
div.desc{
    text-align: center;
    padding: 5px;
}
div.img:hover{
    border: 1px solid #000000;
}
.n1{
    height:300px;
}
.n2{
    height:300px;
}

basic.js

function mySwitch() {
    var oBody = document.getElementById("myBody");

    var oOnOff = document.getElementById("myOnOff");
    var ogui = document.getElementById("gui");
    if (oOnOff.src.match('bulbon')) {

        oOnOff.src = "http://www.runoob.com/images/pic_bulboff.gif";
        oBody.style.backgroundColor = "black";
        oBody.background="../static/img/h.jpg"
        oBody.style.color = "white";
        ogui.src = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1509563443074&di=b1bbb3f5714a580e2211e281124636c2&imgtype=0&src=http%3A%2F%2Fpic15.nipic.com%2F20110709%2F7854247_221301558161_2.jpg";
    } else {
        oOnOff.src = "http://www.runoob.com/images/pic_bulbon.gif";
        oBody.style.backgroundColor = "white";
        oBody.style.color = "black";
        ogui.src = "";
        oBody.background="../static/img/timg1.jpg"
    }
}

运行结果：

2.b

2.c

 2.d

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原文地址：https://www.cnblogs.com/decadeyu/p/7773693.html