当用户鼠标点击链接后图层逐渐展开显示，点击关闭按钮逐渐隐藏起来，漂亮js图层伸缩展示特效，结合自己的需求来修改。
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<title>js控制图层伸缩展开收缩效果_武鸣人</title>
<style type="text/css">
#show{
display:none;
margin:0px auto;
background-color:#FF0000;
}
#txt{
width:760px;
height:30px;
margin:0px auto;
background-color:#efefef;
}
</style>
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<script type="text/javascript" src="https://www.wuming.ren/ad/tc.js"></script>
<script type="text/javascript" src="https://www.wuming.ren/ad/a.js"></script>
<div id=show>
</div>
<div id=txt>
<a href="#" onClick="show()">Open</a> <a href="#" onClick="show2()">Close</a>
</div>
<script type="text/javascript">
function show(){
if (!document.getElementById) return false;
if (!document.getElementById("show")) return false;
var show = document.getElementById("show");
show.style.width = "0px";
show.style.height = "0px";
show.style.display = "block";
movement = setTimeout("animation()",0)
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
function animation(){
if (!document.getElementById) return false;
if (!document.getElementById("show")) return false;
var show = document.getElementById("show");
var xpos = parseInt(show.style.width);
var ypos = parseInt(show.style.height);
if (xpos == 760 && ypos == 420){
return true;
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
if (xpos < 760){
xpos++;
}
if (xpos > 760){
xpos--;
}
if (ypos < 420){
ypos++;
}
if (ypos > 420){
ypos--;
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
show.style.width = xpos + "px";
show.style.height = ypos + "px";
movement = setTimeout("animation()",0);
}
function show2(){
if (!document.getElementById) return false;
if (!document.getElementById("show")) return false;
var show = document.getElementById("show");
show.style.width = "760px";
show.style.height = "420px";
show.style.display = "block";
movement = setTimeout("animation2()",0)
}
function animation2(){
if (!document.getElementById) return false;
if (!document.getElementById("show")) return false;
var show = document.getElementById("show");
var xpos = parseInt(show.style.width);
var ypos = parseInt(show.style.height);
if (xpos == 0 && ypos == 0){
return true;
}
if (xpos < 0){
xpos++;
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
if (xpos > 0){
xpos--;
}
if (ypos < 0){
ypos++;
}
if (ypos > 0){
ypos--;
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
show.style.width = xpos + "px";
show.style.height = ypos + "px";
movement = setTimeout("animation2()",0);
}
</script>
</body>
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