超实用的JS后台折叠管理菜单

2024-09-05 12:19:40

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来源：转载

供稿：网友

很漂亮、很常用的后台管理菜单，扩展性很好，可以随意扩充菜单单元，专用于网站后台左侧的管理菜单。

<!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><title>后台的JS树型菜单</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);};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>后台管理</span>> 网页特效> 源码分类> 最新更新> 下载排行</div><div><span>ASP源码</span>> 聊天留言> 企业建站</div><div><span>PHP源码</span>> CMS系统> 学校政府> 影音视频</div><div><span>ASP.NET</span>> 办公管理> 小偷采集> 整站程序</div><div><span>新闻文章</span>> 办公管理> 小偷采集</div></div></body></html>

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