<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<script type="text/javascript">
window.onload=function(){
var ob = document.getElementById('div1');
var ob1 = div1.getElementsByTagName('input');
var ob2= div1.getElementsByTagName('div');
for(var i = 0;i< ob1.length;i++){
ob1[i].index=i;
ob1[i].onmouseover=function(){
for(var i = 0;i< ob1.length;i++){
ob2[i].style.display='none';
ob1[i].className='';
}
this.className='active';
ob2[this.index].style.display='block';
}
ob1[i].onmouseout=function(){
for(var i=0 ; i< ob1.length;i++){
ob2[i]['style']['display']='none';
}
}
}
};
</script>
<body>
<style type="text/css">
#div1 div{
width: 100px;
height: 100px;
border-top: 2px solid grey;
background-color: #ccc;
}
.active {
background-color: yellow;
}
</style>
<div id="div1">
<input type="button" value="1" class="active">
<input type="button" value="2">
<input type="button" value="3">
<input type="button" value="4">
<div style="display:block;" >1111</div>
<div style="display: none;">2222</div>
<div style="display: none;">3333</div>
<div style="display: none;">4444</div>
</div>
</body>
</html>
