<body>
<divοnmοuseοver="over(this)"οnmοuseοut="out(this)">显示部分</div>
<divid="Blk"style="display:none">
<h2>隐藏部分</h2>
</div>
</body>
<script>function over() {//获取div里面名为"Blk"的id鼠标移入时将其显现var Blk = document.getElementById('Blk');Blk.style.display = "block";Blk.style.backgroundColor = "red";}//获取div里面名为"qq"的鼠标移除是将其隐藏function out() {var Blk =document.getElementById('Blk');Blk.style.display = "none";}</script>
