织梦 dedecms 导航条dropdown.js的改进 ，可以设置 织梦 dedecms一个一直都显示的二级菜单，
修复了没有二级菜单时鼠标移上去仍然显示上一个 织梦 dedecms二级菜单的问题.支持一级菜单鼠标离开事件 。
html代码 代码如下: <!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" content="text/html; charset=gb2312" /> <title>我的网站</title> <meta name="description" content="" /> <meta name="keywords" content="" /> <link type="text/css" rel="stylesheet" href="http://www.188163.com/img/fnews/css/style.css" /> </head> <body> <div class="w1000"> <div class="w960"> <!--f1--> <!-- 菜单 --> <div id="menu" class="menus"> <ul> <!-- class='navselect'根据此属性来判断需要默认显示的二级菜单，以便在织梦模板中通用 --> <li class='navselect'><a href="/" rel='dropmenu1'>主 页</a></li> <li><a href='/a/jinrongzixun/'>金融资讯</a></li> <li><a href='/a/gerenjinrong/' rel='dropmenu2'>个人金融</a></li> <li><a href='/a/qiyejinrong/' rel='dropmenu4'>企业金融</a></li> <li><a href='/a/caijingpindao/' rel='dropmenu5'>财经频道</a></li> <li><a href='/a/zhifujiesuan/' rel='dropmenu6'>支付结算</a></li> <li><a href='/a/yewushenqingtongdao/' rel='dropmenu7'>业务申请</a></li> <li><a href='/a/zhongyaogonggao/' >重要公告</a></li> <li><a href='/a/xinyongka/' >信用卡</a></li> </ul> </div> <div class="menus_bottom"> </div> <!-- //二级子类下拉菜单 --> <script type="text/javascript" src="dropdown.js"></script> <ul id="dropmenu1" class="dropMenu"> <li><a href="/a/gerenjinrong/touzilicai/">首页列表</a> | </li> </ul> <ul id="dropmenu2" class="dropMenu"> <li><a href="/a/gerenjinrong/touzilicai/">投资理财</a> | </li> <li><a href="/a/gerenjinrong/grdk/">个人贷款</a> | </li> <li><a href="/a/gerenjinrong/gerenxiaofei/">个人消费贷款</a> | </li> <li><a href="/a/gerenjinrong/xinyong/">信用贷款</a> | </li> <li><a href="/a/gerenjinrong/qichedaikuan/">汽车贷款</a> | </li> <li><a href="/a/gerenjinrong/yishoulou/">一手楼按揭</a> | </li> <li><a href="/a/gerenjinrong/ershoulou/">二手楼按揭</a> | </li> <li><a href="/a/gerenjinrong/grjy/">个人经营贷款</a> | </li> </ul> <ul id="dropmenu4" class="dropMenu"> <li><a href="/a/qiyejinrong/gongsirongzi/">公司融资</a> | </li> <li><a href="/a/qiyejinrong/maoyirongzi/">贸易融资</a> | </li> <li><a href="/a/qiyejinrong/gongsilicai/">公司理财</a> | </li> <li><a href="/a/qiyejinrong/piaojuyewu/">票据业务</a> | </li> <li><a href="/a/qiyejinrong/xiangmurongzi/">项目融资</a> | </li> </ul> <ul id="dropmenu5" class="dropMenu"> <li><a href="/a/caijingpindao/huangjin/">黄金</a> | </li> <li><a href="/a/caijingpindao/zhaiquan/">债券</a> | </li> <li><a href="/a/caijingpindao/waihui/">外汇</a> | </li> <li><a href="/a/caijingpindao/jijin/">基金</a> | </li> </ul> <ul id="dropmenu6" class="dropMenu"> <li><a href="/a/zhifujiesuan/pos/">P0S支付</a> | </li> </ul> <ul id="dropmenu7" class="dropMenu"> <li><a href="/a/yewushenqingtongdao/gerenyewu/">个人业务咨询</a> & amp;nbsp;| </li> <li><a href="/a/yewushenqingtongdao/gongsiyewu/">公司业务咨询</a> & amp;nbsp;| </li> </ul> <ul id="dropmenu8" class="dropMenu"> </ul> <ul id="dropmenu3" class="dropMenu"> </ul> <script type="text/javascript"> cssdropdown.startchrome("menu")</script> </div> </div> <!--1000 end --> </body> </html> dropdown.js 代码如下: var cssdropdown = { disappeardelay: 250, disablemenuclick: false, enableswipe: 1, enableiframeshim: 1, dropmenuobj: null, ie: document.all, firefox: document.getElementById && !document.all, swipetimer: undefined, bottomclip: 0, getposOffset: function(what, offsettype) { var totaloffset = (offsettype == "left") ? what.offsetLeft: what.offsetTop; var parentEl = what.offsetParent; while (parentEl != null) { totaloffset = (offsettype == "left") ? totaloffset + parentEl.offsetLeft: totaloffset + parentEl.offsetTop; parentEl = parentEl.offsetParent; } return totaloffset; }, swipeeffect: function() { if (this.bottomclip < parseInt(this.dropmenuobj.offsetHeight)) { this.bottomclip += 10 + (this.bottomclip / 10); this.dropmenuobj.style.clip = "rect(0 auto " + this.bottomclip + "px 0)"; } else return; this.swipetimer = setTimeout("cssdropdown.swipeeffect()", 10); }, //隐藏或者显示二级菜单 showhide: function(obj, e) { if (this.ie || this.firefox) this.dropmenuobj.style.left = this.dropmenuobj.style.top = "-500px"; if (e.type == "click" && obj.visibility == hidden || e.type == "mouseover") { if (this.enableswipe == 1) { if (typeof this.swipetimer != "undefined") clearTimeout(this.swipetimer); obj.clip = "rect(0 auto 0 0)"; this.bottomclip = 0; this.swipeeffect(); } obj.visibility = "visible"; } else if (e.type == "click") obj.visibility = "hidden"; }, iecompattest: function() { return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement: document.body; }, clearbrowseredge: function(obj, whichedge) { var edgeoffset = 0; if (whichedge == "rightedge") { var windowedge = this.ie && !window.opera ? this.iecompattest().scrollLeft + this.iecompattest().clientWidth - 15 : window.pageXOffset + window.innerWidth - 15; this.dropmenuobj.contentmeasure = this.dropmenuobj.offsetWidth; if (windowedge - this.dropmenuobj.x < this.dropmenuobj.contentmeasure) edgeoffset = this.dropmenuobj.contentmeasure - obj.offsetWidth; } else { var topedge = this.ie && !window.opera ? this.iecompattest().scrollTop: window.pageYOffset; var windowedge = this.ie && !window.opera ? this.iecompattest().scrollTop + this.iecompattest().clientHeight - 15 : window.pageYOffset + window.innerHeight - 18; this.dropmenuobj.contentmeasure = this.dropmenuobj.offsetHeight; if (windowedge - this.dropmenuobj.y < this.dropmenuobj.contentmeasure) { edgeoffset = this.dropmenuobj.contentmeasure + obj.offsetHeight; if ((this.dropmenuobj.y - topedge) < this.dropmenuobj.contentmeasure) edgeoffset = this.dropmenuobj.y + obj.offsetHeight - topedge; } } return edgeoffset; }, //鼠标移动到一级菜单上执行 dropit: function(obj, e, dropmenuID) { //隐藏上次显示的二级菜单 if (this.dropmenuobj != null) this.dropmenuobj.style.visibility = "hidden"; this.clearhidemenu(); if (this.ie || this.firefox) { var me = this; //一级菜单鼠标离开事件 obj.onmouseout = function() { cssdropdown.delayhidemenu(); }; //一级菜单鼠标点击事件 obj.onclick = function() { return ! cssdropdown.disablemenuclick }; if (!dropmenuID) { return; } this.dropmenuobj = document.getElementById(dropmenuID); if (!this.dropmenuobj) return; //为二级菜单绑定鼠标移动到事件 this.dropmenuobj.onmouseover = function() { //移除从一级菜单离开时触发的方法，防止误执行 cssdropdown.clearhidemenu(); } //为二级菜单绑定鼠标离开事件 this.dropmenuobj.onmouseout = function(e) { cssdropdown.dynamichide(e); } //为二级菜单绑定鼠标点击事件 this.dropmenuobj.onclick = function() { cssdropdown.delayhidemenu(); } this.showhide(this.dropmenuobj.style, e); //调整二级菜单位置，以免位置错乱 this.dropmenuobj.x = this.getposOffset(obj, "left"); this.dropmenuobj.y = this.getposOffset(obj, "top"); this.dropmenuobj.style.left = this.dropmenuobj.x - this.clearbrowseredge(obj, "rightedge") + "px"; this.dropmenuobj.style.top = this.dropmenuobj.y - this.clearbrowseredge(obj, "bottomedge") + obj.offsetHeight + 1 + "px"; this.positionshim(); } }, positionshim: function() { if (this.enableiframeshim && typeof this.shimobject != "undefined") { if (this.dropmenuobj.style.visibility == "visible") { this.shimobject.style.width = this.dropmenuobj.offsetWidth + "px"; this.shimobject.style.height = this.dropmenuobj.offsetHeight + "px"; this.shimobject.style.left = this.dropmenuobj.style.left; this.shimobject.style.top = this.dropmenuobj.style.top; } this.shimobject.style.display = (this.dropmenuobj.style.visibility == "visible") ? "block": "none"; } }, hideshim: function() { if (this.enableiframeshim && typeof this.shimobject != "undefined") this.shimobject.style.display = 'none'; }, contains_firefox: function(a, b) { while (b.parentNode) if ((b = b.parentNode) == a) return true; return false; }, //隐藏二级菜单，兼容性处理 dynamichide: function(e) { var evtobj = window.event ? window.event: e; //确认是鼠标离开事件，避免误触发 if (this.ie && !this.dropmenuobj.contains(evtobj.toElement)) this.delayhidemenu(); else if (this.firefox && e.currentTarget != evtobj.relatedTarget && !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget)) this.delayhidemenu(); }, //鼠标点击菜单，或者离开菜单时执行 delayhidemenu: function() { this.delayhide = setTimeout(function() { cssdropdown.dropmenuobj.style.visibility = 'hidden'; cssdropdown.hideshim(); cssdropdown.showAlways(); }, this.disappeardelay); }, //移除定时方法 clearhidemenu: function() { if (this.delayhide != "undefined") clearTimeout(this.delayhide); }, //显示默认被选中的一级菜单 showAlways: function() { if (this.always) { this.always.onmouseover({ type: "mouseover" }); } }, //初始化 startchrome: function() { for (var ids = 0; ids < arguments.length; ids++) { var menuitems = document.getElementById(arguments[ids]).getElementsByTagName("a"); for (var i = 0; i < menuitems.length; i++) { var relvalue = menuitems[i].getAttribute("rel"); //绑定鼠标移动到事件 menuitems[i].onmouseover = function(e) { var event = typeof e != "undefined" ? e: window.event; cssdropdown.dropit(this, event, this.getAttribute("rel")); }; //显示默认被选中的一级菜单 if (!this.always && menuitems[i].parentNode.getAttribute("class") == "navselect") { this.always = menuitems[i]; this.showAlways(); } } } if (window.createPopup && !window.XmlHttpRequest) { document.write('<IFRAME id="iframeshim" src="" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>'); this.shimobject = document.getElementById("iframeshim"); } } }
