JavaScript实现多层颜色选项卡嵌套

本文实例为大家分享了javascript实现多层颜色选项卡嵌套的具体代码，供大家参考，具体内容如下

这是学javascript时候的一个作业，如果没有思路还是挺有难度的，但是思路正确的话一步一步来就很简单做出来了。

实现效果

html部分代码

 <div class="box" id="box">
 <ul id="leftbox">
  <li class="active">a</li>
  <li>b</li>
  <li>c</li>
  <li>d</li>
 </ul>
 <div id="rightbox">
  <div id="rightbox1" class="active">
  <a href="#" >a1</a>
  <ul class="tabul">
   <li class="hover">a1</li>
   <li>a2</li>
   <li>a3</li>
   <li>a4</li>
  </ul>
  </div>
  <div id="rightbox2">
  <a href="#" >b1</a>
  <ul class="tabul">
   <li class="hover">b1</li>
   <li>b2</li>
   <li>b3</li>
   <li>b4</li>
  </ul>
  </div>
  <div id="rightbox3">
  <a href="#" >c1</a>
  <ul class="tabul">
   <li class="hover">c1</li>
   <li>c2</li>
   <li>c3</li>
   <li>c4</li>
   <li>c5</li>
   <li>c6</li>
  </ul>
  </div>
  <div id="rightbox4">
  <a href="#" >d1</a>
  <ul class="tabul">
   <li class="hover">d1</li>
   <li>d2</li>
   <li>d3</li>
   <li>d4</li>
  </ul>
  </div>
 </div>
</div>

css部分代码

<style>
 * {
  margin: 0px;
  padding: 0px;
  list-style: none;
  text-decoration: none;
 }

 .box {
  width: 800px;
  border: 1px solid #000000;
  margin: 20px auto;
  background: blue;
 }

 .box:after {
  content: "";
  display: block;
  clear: both;
 }

 #leftbox {
  float: left
 }

 #rightbox {
  float: left;
 }

 #leftbox li {
  width: 200px;
  height: 89px;
  background: red;
  margin-bottom: 2px;
  color: #fff;
  font: 50px/89px "黑体";
  text-align: center;
 }

 #rightbox div {
  display: none;
 }

 #rightbox .active {
  display: block;
 }

 #rightbox a {
  display: block;
  width: 600px;
  height: 325px;
  background: #0f0;
  font-size: 100px;
  color: #000;
  text-align: center;
  text-decoration: none;
  line-height: 360px;
 }

 .tabul {
  display: table;
  width: 100%;
 }

 .tabul li {
  display: table-cell;
  background: #909;
  color: #fff;
  font-size: 20px;
  text-align: center;
  height: 40px;
  line-height: 40px;
  border-right: 2px solid #03c;
  cursor: pointer;
 }

 .tabul li.hover {
  background: #fff;
  color: #000;
 }

 #leftbox .active {
  background: yellow;
  color: #000;
 }
</style>

javascript实现代码

思路：鼠标移入左边的每个li后，都会改变他的颜色，所以只需要改变class名，同时右边也会显示对于的div，有对应的话一般都会用到自定义索引值和this…

<script>
 /* 
 点击左边的li后，所点击li加上class名，其它清除所有，然后右边对应索引值的div也加上class=active，所以要用到this

  */

 //获取元素
 var lul = document.getelementbyid('leftbox')
 var rul = document.getelementbyid('rightbox')
 var lli = lul.getelementsbytagname('li')
 var odiv = rul.getelementsbytagname('div')

 //改变左边样式
 for (var i = 0; i < lli.length; i++) {
  //自定义索引
  lli[i].index = i
  lli[i].onmouseenter = function () {
  //清空所有classname
  for (var j = 0; j < lli.length; j++) {
   lli[j].classname = ''
   odiv[j].classname = ''
  }
  //给相应的li添加上classname
  this.classname = 'active'
  odiv[this.index].classname = 'active'
  }
 }


 //右边
 for (var k = 0; k < odiv.length; k++) {
  fn(odiv[k])
 }
 function fn(parent) {
  //获取用到的元素
  var rli = parent.getelementsbytagname('li')
  var oa = parent.getelementsbytagname('a')[0]
  for (var i = 0; i < rli.length; i++) {
   rli[i].onmouseenter = function(){
   for (j = 0; j < lli.length; j++) {
    rli[j].classname = ''
   }
   this.classname = 'hover'
   //把li标签中的文字传到a标签中
   oa.innerhtml = this.innerhtml
   }
  
  }
  
 }
</script>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。