超實(shí)用的JS后臺(tái)折疊管理菜單_菜單導(dǎo)航特效

很漂亮、很常用的后臺(tái)治理菜單，擴(kuò)展性很好，可以隨意擴(kuò)充菜單單元，專用于網(wǎng)站后臺(tái)左側(cè)的治理菜單。

<!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">
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=utf-8" />
<meta http-equiv="Content-Type" mrc="; charset=utf-8" />
<title>后臺(tái)的JS樹(shù)型菜單-codes by /</title>
<script type="text/javascript">
	var myMenu;
	window.onload = function() {
		myMenu = new SDMenu("my_menu");
		myMenu.init();
	};
</script>
<style type="text/css">
	html,body{
		height:100%;
		margin:0;
		font-size:12px;
	}
	span{
		background:#F0DFBE;
		border:1px solid #ffffff;
		border-left:6px solid #F2A31B;
		width:166px;
		height:23px;
		display:block;
		line-height:23px;
		padding-left:20px;
	}
	a{
		padding:3px 0 3px 40px;
		display:block;
		color:#636363;
	}
	#my_menu{
		width:166px;
		background:#F7F2E4;
		height:100%;
	}
	div.sdmenu div.collapsed {
	height: 25px;
}
	div.sdmenu div{
		overflow: hidden;
	}
</style>
<script>
function SDMenu(id) {
	if (!document.getElementById || !document.getElementsByTagName)
		return false;
	this.menu = document.getElementById(id);
	this.submenus = this.menu.getElementsByTagName("div");
	this.remember = true;
	this.speed = 1;
	this.markCurrent = true;
	this.oneSmOnly = false;
}
SDMenu.prototype.init = function() {
	var mainInstance = this;
	for (var i = 0; i < this.submenus.length; i++)
		this.submenus[i].getElementsByTagName("span")[0].onclick = function() {
			mainInstance.toggleMenu(this.parentNode);
		};
	if (this.markCurrent) {
		var links = this.menu.getElementsByTagName("a");
		for (var i = 0; i < links.length; i++)
			if (links[i].href == document.location.href) {
				links[i].className = "current";
				break;
			}
	}
	if (this.remember) {
		var regex = new RegExp("sdmenu_" + encodeURIComponent(this.menu.id) + "=([01]+)");
		var match = regex.exec(document.cookie);
		if (match) {
			var states = match[1].split("");
			for (var i = 0; i < states.length; i++)
				this.submenus[i].className = (states[i] == 0 ? "collapsed" : "");
		}
	}
};
SDMenu.prototype.toggleMenu = function(submenu) {
	if (submenu.className == "collapsed")
		this.expandMenu(submenu);
	else
		this.collapseMenu(submenu);
};
//htp:
SDMenu.prototype.expandMenu = function(submenu) {
	var fullHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var links = submenu.getElementsByTagName("a");
	for (var i = 0; i < links.length; i++)
		fullHeight += links[i].offsetHeight;
	var moveBy = Math.round(this.speed * links.length);
	
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight + moveBy;
		if (newHeight < fullHeight)
			submenu.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "";
			mainInstance.memorize();
		}
	}, 30);
	this.collapseOthers(submenu);
};
SDMenu.prototype.collapseMenu = function(submenu) {
	var minHeight = submenu.getElementsByTagName("span")[0].offsetHeight;
	var moveBy = Math.round(this.speed * submenu.getElementsByTagName("a").length);
	var mainInstance = this;
	var intId = setInterval(function() {
		var curHeight = submenu.offsetHeight;
		var newHeight = curHeight - moveBy;
		if (newHeight > minHeight)
			submenu.style.height = newHeight + "px";
		else {
			clearInterval(intId);
			submenu.style.height = "";
			submenu.className = "collapsed";
			mainInstance.memorize();
		}
	}, 30);
};
SDMenu.prototype.collapseOthers = function(submenu) {
	if (this.oneSmOnly) {
		for (var i = 0; i < this.submenus.length; i++)
			if (this.submenus[i] != submenu && this.submenus[i].className != "collapsed")
				this.collapseMenu(this.submenus[i]);
	}
};
SDMenu.prototype.memorize = function() {
	if (this.remember) {
		var states = new Array();
		for (var i = 0; i < this.submenus.length; i++)
			states.push(this.submenus[i].className == "collapsed" ? 0 : 1);
		var d = new Date();
		d.setTime(d.getTime() + (30 * 24 * 60 * 60 * 1000));
		document.cookie = "sdmenu_" + encodeURIComponent(this.menu.id) + "=" + states.join("") + "; expires=" + d.toGMTString() + "; path=/";
	}
};
</script>
</head>

<body>
<div style="float:left" id="my_menu" class="sdmenu">
<div>
<span>模板無(wú)憂后臺(tái)治理</span>
<a href="/jscss/">> 網(wǎng)頁(yè)殊效</a>
<a href="/sort/index.shtml">> 源碼分類</a>
<a href="/other/lastupdate.shtml">> 最新更新</a>
<a href="/other/top100.shtml">> 下載排行</a>
</div>
<div>
<span>ASP源碼下載</span>
<a href="/sort/list_1_11_1.shtml">> 聊天留言</a>
<a href="/sort/list_1_12_1.shtml">> 企業(yè)建站</a>
</div>
<div>
<span>PHP源碼下載</span>
<a href="http://sort/list_1_29_1.shtml">> CMS系統(tǒng)</a>
<a href="/sort/list_1_20_1.shtml">> 學(xué)校政府</a>
<a href="/sort/list_1_28_1.shtml">> 影音視頻</a>
</div>
<div>
<span>ASP.NET精品源碼</span>
<a href="/sort/list_1_25_1.shtml">> 辦公治理</a>
<a href="/sort/list_1_31_1.shtml">> 小偷采集</a>
<a href="/sort/list_1_26_1.shtml">> 整站程序</a>
</div>
<div>
<span>新聞文章治理</span>
<a href="/sort/list_1_25_1.shtml">> 辦公治理</a>
<a href="/sort/list_1_31_1.shtml">> 小偷采集</a>
</div>
</div>
</body>
</html>

所屬頻道：菜單導(dǎo)航特效/更新時(shí)間：2010-05-22

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特效說(shuō)明：
菜單導(dǎo)航模板-超實(shí)用的JS后臺(tái)折疊管理菜單。

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