<style>
div{
width: 200px;
height: 80px;
border:1px solid #000;
color: red;
display: none;
}
.on{
color: #6cf;
background: green;
}
</style>
<script>
window.onload=function(){
var aBtn=document.getElementsByTagName('input');
var aDiv=document.getElementsByTagName('div');
var timer;
for(var i=0; i<aBtn.length;i++){
aBtn[i].index=i;
aBtn[i].onmouseover=function(){
var _this=this;
timer = setTimeout(function() {
for (var i = 0; i < aBtn.length; i++) {
aBtn[i].className = '';
aDiv[i].style.display = 'none';
}
_this.className = 'on';
aDiv[_this.index].style.display = 'block';
},200);
}
aBtn[i].onmouseout = function(){
clearTimeout(timer);
};
}
}
</script>
</head>
<body>
<input type="button" value="天气" class="on"/>
<input type="button" value="体育" />
<input type="button" value="动漫" />
<div style="display:block;">明天白天多云转晴</div>
<div>今日刘彬代表国家队取得了第一个奖牌</div>
<div>海贼王还要更新10年。。。</div>
</body>
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