JS带缓冲效果打开、关闭、移动一个层_层和布局特效

JavaScript带缓冲效果打开关闭一个层，很牛的效果，有缓冲的作用会看上去更人性一点，符合人的视觉感受，会对你的网页产生好感，试试吧，把它应用到你的项目中，相必会不错的。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="gb2312">
<head>
<title>JavaScript缓冲打开层</title>
<meta http-equiv="Content-Type" mrc="text/html; charset=gb2312" />
<style type="text/css">
* { margin:0; padding:0; }
body { margin:5px auto; text-align:center; background:#f0f0f0; }
#d1 { position:absolute; top:20px; left:20px; width:100px; height:60px; border:1px solid #808; }
#d2 { position:absolute; top:100px; left:20px; width:100px; height:60px; border:1px solid #808; }
#open1, #close1, #open2, #close2 { cursor:pointer; background:#ccf; margin:5px; }
#open1, #open2 { display:block; }
#close1, #close2 { display:none; }
</style>
</head>
<body>
<div id="d1">
	移动位置
	<span id="open1" onclick="fo1()">Open</span>
	<span id="close1" onclick="fc1()">Close</span>
</div>
<div id="d2">
	改变大小
	<span id="open2" onclick="fo2()">Open</span>
	<span id="close2" onclick="fc2()">Close</span>
</div>
<div id="debug">AAA</div>
<script type="text/javascript">
//<[CDATA[
var sl = 20;	//初始left值
var el = 500;	//结束left值
var sw = 100;//初始width值
var ew = 580;//结束width值
var p = 10;	//缓冲变量
var t = 20;	//时间变量
var d1 = document.getElementById('d1');
var d2 = document.getElementById('d2');
var debug = document.getElementById('debug');
var open1 = document.getElementById('open1');
var close1 = document.getElementById('close1');
var open2 = document.getElementById('open2');
var close2 = document.getElementById('close2');
function fo1() {
	var cl = parseInt(getStyle(d1,'left'));	//当前left值
	if (cl<el) {
		d1.style.left = cl + Math.ceil((el-cl)/p) + 'px';	//当前值+缓冲增量
		debug.innerHTML = getStyle(d1,'left');	//cl + 'px';
		setTimeout('fo1()', t);
	} else {
		d1.style.left = el + 'px';
		open1.style.display = 'none';
		close1.style.display = 'block';
	}
}
function fc1() {
	var cl = parseInt(getStyle(d1,'left'));	//当前left值
	if (cl>sl) {
		d1.style.left = cl - Math.ceil((cl-sl)/p) + 'px';	//当前值-缓冲增量
		debug.innerHTML = getStyle(d1,'left');	//cl + 'px';
		setTimeout('fc1()', t);
	} else {
		d1.style.left = sl + 'px';
		open1.style.display = 'block';
		close1.style.display = 'none';
	}
}
function fo2() {
	var cw = parseInt(getStyle(d2,'width'));	//当前width值
	if (cw<ew) {
		d2.style.width = cw + Math.ceil((ew-cw)/p) + 'px';	//当前值+缓冲增量
		debug.innerHTML = getStyle(d2,'width');	//cw + 'px';
		setTimeout('fo2()', t);
	} else {
		d2.style.width = ew + 'px';
		open2.style.display = 'none';
		close2.style.display = 'block';
	}
}
function fc2() {
	var cw = parseInt(getStyle(d2,'width'));	//当前width值
	if (cw>sw) {
		d2.style.width = cw - Math.ceil((cw-sw)/p) + 'px';	//当前值-缓冲增量
		debug.innerHTML = getStyle(d2,'width');	//cw + 'px';
		setTimeout('fc2()', t);
	} else {
		d2.style.width = sw + 'px';
		open2.style.display = 'block';
		close2.style.display = 'none';
	}
}
function getStyle( elem, name ) { 
	if (elem.style[name]) { return elem.style[name]; } 
	else if (elem.currentStyle) { return elem.currentStyle[name]; } 
	else if (document.defaultView && document.defaultView.getComputedStyle) { 
		name = name.replace(/([A-Z])/g,"-$1"); 
		name = name.toLowerCase(); 
		var s = document.defaultView.getComputedStyle(elem,""); 
		return s && s.getPropertyValue(name); 
	} 
	else { return null; } 
}
//]]>
</script>
</body>
</html>

所属频道：层和布局特效/更新时间：2012-11-14

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