console
<style>
div{width:200px;height:200px;background:#CCC;display:none}
input{background-color:#FFF;}
.active{background:#FF0;}
</style>
<title>无标题文档</title>
<script type="text/javascript">
window.onload=function ()
{
var aBtn=document.getElementsByTagName('input');
var aDiv=document.getElementsByTagName('div');
var i=0;
for(i=0;i<aBtn.length;i++)
{
aBtn[i].index=i;
aBtn[i].onclick=function ()
{
for(i=0;i<aBtn.length;i++)
{
aBtn[i].className='';
aDiv[i].style.display='none';
}
this.className='active';
aDiv[this.index].style.display='block';
};
}
};
</script>
</head>
<body>
<input type="button" class="active" value="1"/>
<input type="button" value="2"/>
<input type="button" value="3"/>
<div style="display:block">1111</div>
<div>2222</div>
<div>3333</div>
</body>