<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>选项卡</title>
<style type="text/css">
.active{
background: yellow;
}
div{
width: 100px;
height: 100px;
background: #888888;
display: none;
}
</style>
<script type="text/javascript">
window.onload=function()
{
var aBtn=document.getElementsByTagName('input');
var aDiv=document.getElementsByTagName('div');
for(var i=0;i<aBtn.length;i++)
{
aBtn[i].index=i;//设置索引
aBtn[i].onmouseover=function()
{
for(i=0;i<aBtn.length;i++)
{
aBtn[i].className ='';
aDiv[i].style.display='none';
}
this.className='active';//this 指当前发生的事件;
aDiv[this.index].style.display='block';//this.index 加入索引值
//注意:通过html 自定义的属性,浏览器是不通过的,而通过js 加进去的能行
}
};
}
</script>
</head>
<body>
<input class="active" type="button" value="1">
<input type="button" value="2">
<input type="button" value="3">
<div style="display:block;">11111</div>
<div>22222</div>
<div>333333</div>
</body>
</html>