#sideBar{
width:400px;
height:300px;
position: fixed;
right: 0px;
bottom: 0px;
border: 1px solid red;
}
</style>
<script type="text/javascript">
window.onLoad = function()
{
var TipBox = document.getElementById("sideBar");
var CloseBtn = document.getElementById("CloseBtn");
CloseBtn.onClick =function(){TipBox.style.display="none";}
}
</script>
</head>
<body>
<div id="sideBar">
<div class="pic">
<div class="whatNm"><a href="" id="CloseBtn">a</a></div>
</div>
</div>
Zhenlei
Zhenlei