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<html>
<head>
<style type="text/css">
#div2{
margin-top:50px;
margin-left:250px;
width:450px;
height:300px;
background:#FFFFFF;
border:solid 1px #c3c3c3
}
#div1{
display:none;
margin-top:50px;
margin-left:250px;
width:200px;
padding:40px;
background:#FFFFFF;
border:solid 1px #c3c3c3
}
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/JavaScript">
$(function(){
$("#div2").mouseout(function(){$("#div1").hide();}).mouseover(function(){$("#div1").show();});
})
</script>
</head>
<body>
<div id="div2" class="b">
把鼠标放在上面
<div id="div1" class="a">
区域DIV1中的内容
</div>
</div>
<html>
<head>
<script>
window.onload = function () {
var divObj = document.getElementById("rightDiv");
divObj.style.width = parseInt(document.body.offsetWidth) / 3;
divObj.style.height = document.body.offsetHeight;
var isOverDiv = false;
document.body.onmousemove = function (e) {
var e = e || window.event;
if (parseInt(divObj.style.width) > parseInt(document.body.offsetWidth) - parseInt(e.clientX)) {
isOverDiv = true;
divObj.style.display = '';
}
if (parseInt(divObj.style.width) < parseInt(document.body.offsetWidth) - parseInt(e.clientX) && isOverDiv) {
divObj.style.display = 'none';
}
}
}
</script>
</head>
<body>
<div >
<div id='rightDiv' style="background:black; border:2px #FF0000 solid;position:absolute; z-index:10000; top:5px; right:0px; display:none; ">
</div>
<div style="width:100%;height:100%;position:relative">
<div style="position:absolute;width:100%;height:100%;filter:alpha(opacity=0);opacity:0;background:#000"></div>
<iframe src="http://www.baidu.com" width="100%" ></iframe>
</div>
</div>
</body>
</html>