<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" lang="zh-CN">
<head>
<title>层展开/关闭 - 运动缓冲效果</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="keywords" content="小秦,展开,关闭,运动缓冲,效果,javascript,封装" />
<meta name="description" content="展开/关闭 - 运动缓冲效果" />
<meta name="copyright" content="Copyright 2008 XQin.cn" />
<meta name="author" content="小秦" />
<script type="text/javascript">
/*
函数名称: Scroll
Scroll(obj, h, s)
参数说明:
obj,[object] id值或对象. 必需
h,[height] 展开后的高度. 可选(默认为200px)
s,[speed] 展开速度,值越小展开速度越慢. 可选(默认为1.2){建议取值为1.1到2.0之间[例如:1.17]}.
函数返回值:
true 展开(对象的高度等于展开后的高度)
false 关闭(对象的高度等于原始高度)
*/
function Scroll(obj, h, s){
if(obj == undefined){return false;}
var h = h || 200;
var s = s || 1.2;
var obj = typeof(obj)=="string"?document.getElementById(obj):obj;
var status = obj.getAttribute("status")==null;
var oh = parseInt(obj.offsetHeight);
obj.style.height = oh;
alert(obj.oldHeight);
obj.style.display = "normal";
obj.style.overflow = "hidden";
if(obj.getAttribute("oldHeight") == null)
{
obj.setAttribute("oldHeight", oh);
}else
{
var oldH = Math.ceil(obj.getAttribute("oldHeight"));
}
var reSet = function(){
if(status)
{
if(oh < h)
{ oh = Math.ceil(h-(h-oh)/s);
obj.style.height = oh+"px";
}
else
{
obj.setAttribute("status",false);
window.clearInterval(IntervalId);
}
}
else
{
obj.style.height = oldH+"px";
obj.removeAttribute("status");
window.clearInterval(IntervalId);
}
}
var IntervalId = window.setInterval(reSet,10);
return status;
}
window.onload= function(){
document.getElementById('detail').onclick = function(){
Scroll('detail', 300, 1.3);
}
document.getElementById('text').onclick = function(){
Scroll('text');
}
}
</script>
</head>
<body>
<p id="detail" style="border:1px dashed #f00;">这是一个段落啦!!哇哈哈哈<br/>点我一下下啦:)</p>
<div id="text" style="border:1px solid #0f0">Hello World!<br/>你敢点我不 -_|||</div>
<button onclick="Scroll('text',400 , 1.2)">Hello World</button>
</body>
</html>
我想问一下js中有这个oldHeight属性吗？我怎么没找到呢？
if(obj.getAttribute("oldHeight") == null)
{
obj.setAttribute("oldHeight", oh);
明显是自定义属性嘛....
obj.setAttribute("oldHeight", oh); //就给他设置一个oldHeight属性,值为oh
}