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How to implement js tab

高洛峰
Release: 2017-02-04 14:34:33
Original
971 people have browsed it

The example of this article describes the implementation method of js tab. Share it with everyone for your reference. The specific analysis is as follows:

1. Ideas

1. Get the element;

2. Add onclick (click) or onmousemove (move in) event to the for loop button element;

3. When the current button is clicked, it will be displayed in a highlighted state. Through the for loop, set the style of all buttons to empty and set the display of all divs to none.

4. Click the current button to add a style, display the current div, and set display to block.

2. HTML code:

<div id="div1">
    <input type="button" class="active" value="1"/>
    <input type="button" value="2"/>
    <input type="button" value="3"/> 
    <input type="button" value="4"/>
      <div class="div2" style="display:block;">11</div>
      <div class="div2">22</div>
      <div class="div2">33</div>
      <div class="div2">44</div>
</div>
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3. CSS part:

.active
{
background:#9CC;
}
.div2
{
width:300px;
height:200px;
border:1px #666666 solid;
display:none;
}
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4. JS code:

<script>
window.onload=function(){
   var odiv=document.getElementById(&#39;div1&#39;);//获取div
   var btn=odiv.getElementsByTagName(&#39;input&#39;);//获取div下的input
   var div2=odiv.getElementsByTagName(&#39;div&#39;) ;//获取div下的div
 
  for(i=0;i<btn.length;i++)//循环每个按钮
   {
     btn[i].index=i
//btn[i]是指定button的第i个按钮;为该按钮添加一个index属性,并将index的值设置为i
     btn[i].onclick=function()//按钮的第i个点击事件
    {
    for(i=0;i<btn.length;i++)//循环去掉button的样式,把div隐藏
     {
       btn[i].className=&#39;&#39; //清空按钮的样式
       div2[i].style.display=&#39;none&#39;//隐藏div
      }
        this.className=&#39;active&#39;//自身添加active
        div2[this.index].style.display=&#39;block&#39;//this.index是当前div
    }
   }
}
</script>
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I hope this article will be helpful to everyone’s javascript programming.

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