效果图如下：
以下是代码示例：
实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>选项卡</title>
<!-- 选项卡CSS -->
<style type="text/css">
h2 {
text-align: center;
}
.box {
width: 500px;
height:600px;
border: 1px solid #ccc;
margin: 20px auto;
color: orange;
}
ul {
margin: 0;
padding: 0;
background-color: #f8f8f8;
overflow: hidden;
}
.box > ul li {
list-style-type: none;
width:90px;
height:36px;
text-align: center;
line-height: 36px;
float: left;
border-right: 1px solid #ccc;
border-bottom: 1px solid #ccc;
}
.box > span {
float: right;
width: 100px;
height: 36px;
line-height: 36px;
margin-top: -36px;
}
.box span a {
text-decoration: none;
color: #696969;
}
.box li.active {
background-color: #fff;
font-weight: bolder;
border-bottom: none;
border-top: 3px solid orangered;
}
.contents > div {
display:none;
width:100%;
height:550px;
/*background-color: lightgreen;*/
/*border:1px solid red;*/
margin: 5px auto;
text-align: center;
}
</style>
<!-- 相册CSS -->
<style type="text/css">
.mxxc {
margin: 0;
padding: 0;
overflow: hidden;
}
.mxxc li {
list-style-type: none;
float:left;
background-color: skyblue;
margin-left: 20px;
}
.mxxc li a {
/*将a转为块元素,并设置为li的宽高,这样可以使整个li可以被点击*/
display: block;
width: 100px;
height: 40px;
line-height: 40px;
color: white;
text-decoration: none;
}
.mxxc li:hover {
font-size:1.2em;
background-color: coral;
}
.mxxc + .pic {
width: 300px;
height:350px;
border: 1px solid lightgray;
/*消除img标签底部的空间区*/
line-height: 1px;
margin: auto;
margin-top: 50px;
}
.mxxc + .pic img {
width: 100%;
height: 100%;
}
</style>
<!-- 计算器CSS -->
<style type="text/css">
table {
margin: auto;
}
td {
width: 150px;
height: 30px;
padding: 5px 10px;
text-align: right;
}
input, select {
width: 200px;
height:100%;
text-align: center;
}
select {
width: 204px;
}
button {
width: 100%;
height: 100%;
border: none;
background-color: skyblue;
color: white;
}
button:hover {
cursor: pointer;
background-color: coral;
width: 105%;
height: 105%;
}
</style>
<!-- 客服CSS -->
<style type="text/css">
.content:nth-child(3){
width: 450px;
height: 530px;
margin: 10px auto;
border: 3px solid #fcc;
color: #333;
}
.content:nth-child(3) div{
width: 100%;
height: 430px;
border-bottom: 2px solid #fcc;
background-color: #efefef;
margin: 0 auto;
}
.content:nth-child(3) div ul {
line-height: 2em;
text-align: left;
}
.content:nth-child(3) div ul li {
background-color: #efefef;
padding-left:10px;
padding-top:5px;
}
.content:nth-child(3) div table {
width: 100%;
height:80px;
margin:0 auto;
}
textarea{
width: 330px;
height:80px;
border: 1px solid #fcc;
resize: none;
background-color: lightyellow;
}
.content:nth-child(3) button {
width: 60px;
height: 40px;
background-color: seagreen;
color: white;
border: none;
}
.content:nth-child(3) button:hover {
cursor: pointer;
background-color: orange;
}
</style>
</head>
<body>
<h2>综合选项卡</h2>
<div class="box">
<ul>
<li class="active">明星相册</li>
<li>计算器</li>
<li>客服妹妹</li>
</ul>
<span><a href="">更多内容>></a></span>
<div class="contents">
<div class="content" style="display: block">
<ul class="mxxc">
<li>
<a href="images/zly.jpg" title="《楚乔传》,《花千骨》,《陆贞传奇》..." onclick="changePic(this);return false">赵丽颖</a>
</li>
<li>
<a href="images/gyy.jpg" title="《倚天屠龙记》,《咱们经婚吧》,《爱无悔》..." onclick="changePic(this);return false">高圆圆</a>
</li>
<li>
<a href="images/sl.jpg" title="《那年花开月正圆》,《甑环传》,《玉观音》..." onclick="changePic(this);return false">孙俪</a>
</li>
<li><a href="images/fbb.jpg" title="《还珠格格》,《武媚娘传奇》,《我不是潘金莲》..." onclick="changePic(this);return false">范冰冰</a></li>
</ul>
<div class="pic">
<img src="images/zwt.png" alt="" id="img">
</div>
<br>
<p id='info'></p>
</div>
<div class="content">
<h2>HIV cutoff值计算</h2>
<form>
<table>
<tr>
<td>请选择试剂厂商：</td>
<td>
<select name="factory" align:center>
<option value="null">请选择厂商</option>
<option value="bjwt"> 北京万泰 </option>
<option value="zhlz"> 珠海丽珠 </option>
<option value="shkh"> 上海科华 </option>
</select>
</td>
</tr>
<tr>
<td>数值1：</td>
<td><input type="text" name="num1" placeholder=""></td>
</tr>
<tr>
<td>数值2：</td>
<td><input type="text" name="num2" placeholder=""></td>
</tr>
<tr>
<td>数值3：</td>
<td><input type="text" name="num3" placeholder="科华试剂无需输入"></td>
</tr>
<tr>
<td colspan="2"><button type="button">计算</button></td>
</tr>
<tr>
<td>cutoff值：</td>
<td><h3 id="placeholder"></h3></td>
</tr>
</table>
</form>
</div>
<div class="content">
<div contenteditable="true">
<ul>
</ul>
</div>
<table>
<tr>
<td align="right"><textarea cols="50" rows="4" name="text"></textarea></td>
<td align="left"><button type=button>发送</button></td>
</tr>
</table>
</div>
</div>
</div>
<!-- 选项卡JS脚本 -->
<script type="text/javascript">
var box = document.getElementsByClassName('box')[0]
var ul = box.getElementsByTagName('ul')[0]
var li = ul.getElementsByTagName('li')
var content = document.getElementsByClassName('contents')[0]
var list = content.getElementsByClassName('content')
for (var i=0; i<list.length; i++) {
li[i].index = i
li[i].onmouseover = function (){
for (var i = 0; i < li.length; i++) {
li[i].className = ''
list[i].style.display = 'none'
}
this.className = 'active'
list[this.index].style.display = 'block'
}
}
</script>
<!-- 明星相册JS脚本 -->
<script type="text/javascript">
function changePic(pic) {
//1.获取到要替换的明星图片与简介信息
var picUrl = pic.href
var picInfo = pic.title
var picName = pic.innerHTML
//2.获取到页面中,要被替换掉的图像元素对象
var img = document.getElementById('img')
var p = document.getElementById('info')
//3. 将对应的图像与信息占位符进行替换
img.src = picUrl
p.innerHTML = picName+':'+picInfo
p.innerHTML = '<span style="color:coral">'+picName+':'+picInfo+'</span>'
}
</script>
<!-- 计算器JS脚本 -->
<script type="text/javascript">
//1.获取操作数,按钮与结果占位符
var num1 = document.getElementsByName('num1')[0]
var num2 = document.getElementsByName('num2')[0]
var num3 = document.getElementsByName('num3')[0]
var fac = document.getElementsByName('factory')[0]
var btn = document.getElementsByTagName('button')[0]
var placeholder = document.getElementById('placeholder')
//2.给按钮添加事件,执行计算操作
btn.onclick = function(){
var factory = fac.value
var temp = 0
switch (factory){
case 'null':
alert("请选择试剂厂商")
fac.focus()
return false
}
if (num1.value.length == 0 ) {
alert('数值1不能为空')
num1.focus()
return false
} else if (isNaN(num1.value)) {
alert('数值1必须为数字')
num1.focus()
return false
} else if (num2.value.length == 0) {
alert('数值2不能为空')
num2.focus()
return false
} else if (isNaN(num2.value)) {
alert('数值2必须为数字')
num2.focus()
return false
} else if (num3.value.length == 0) {
//当选择"上海科华时"第三个数无需输入
switch (factory){
case 'bjwt':
alert('数值3不能为空')
return false
case 'zhlz':
alert('数值3不能为空')
return false
}
} else if (isNaN(num3.value)) {
alert('数值3必须为数字')
}
{
var data1 = parseFloat(num1.value)
var data2 = parseFloat(num2.value)
var data3 = parseFloat(num3.value)
}
//定义不同试剂厂商的计算公式
switch (factory){
case 'null':
alert("请选择试剂厂商")
fac.focus()
return false
case 'bjwt':
temp = (data1 + data2 + data3)/3+0.12
break
case 'zhlz':
temp = (data1 + data2 + data3)/3+0.15
break
case 'shkh':
temp = (data1 + data2 )/2*0.1
}
var str = '<span style="color:coral">'
str += temp
str += '</span>'
placeholder.innerHTML = str
}
</script>
<!-- 客服JS脚本 -->
<script type="text/javascript">
//获取到页面中的按钮,文本域,对话内容区
var send = document.getElementsByTagName('button')[1]
var text = document.getElementsByName('text')[0]
var mess = document.getElementsByTagName('ul')[2]
var sum = 0
send.onclick = function (){
//检测用户输入信息，如果为空弹出提示信息
if (text.value.length == 0) {
alert('客官:是不是忘记输入内容了~~')
return false
}
var userComment = text.value
text.value = ''
//创建一个'li'
var addli = document.createElement('li')
addli.innerHTML = userComment
var userPic = '<img src="images/peter.jpg" width="30" style="border-radius:50%">'
addli.innerHTML = userPic+userComment
sum += 1
//这里我与朱老师的课程中讲的源码有所不同，在这里先判断窗口中的聊天条数，超过限制先清屏再输出输入内容
if (sum > 8) {
mess.innerHTML = ''
sum = 0
}
//在mess即'ul'中使用函数动态添加一个'li'
mess.appendChild(addli)
setTimeout(function(){
var info = ['你好烦人呀,本姑娘好累,不知道怜香惜玉吗?','除了退货,退款,维修,什么问题都可以问','啥事呀,我的帅哥哥']
var temp = info[Math.floor(Math.random()*3)]
//取1-5之间的一个整数:Math.floor(Math.random()*6 + 1)
var reply = document.createElement('li')
var kefuPic = '<img src="images/zly.jpg" width="30" style="border-radius:50%;">'
// reply.innerHTML = '你有啥事呀,我的帅哥哥' +kefuPic
reply.innerHTML = kefuPic + '<span style="color:red">'+temp+'</span>'
// reply.style.float = 'right'
sum += 1
if (sum > 8) {
mess.innerHTML = ''
sum = 0
}
mess.appendChild(reply)
},2000)
}
</script>
</body>
</html>运行实例 »
点击 "运行实例" 按钮查看在线实例
总结：
此次案例将选项卡功能、相册功能、计算器功能、聊天以及回复功能融合在一起，如果分单个来写相对来说简单一些，放在一起时使用CSS/JS需要注意各个区块的命名规范，渲染页面时需要注意CSS选择器选择制定的模块，JS获取元素时也应该注意该元素在整个文档流中的位置，正确使用获取函数。
手抄JS脚本：
计算器：
聊天机器人：
