www.gusucode.com > 五款秀气的网页菜单源码程序 > 五款秀气的网页菜单/wuxiuqicaidan/js/dropdowntabs.js
//Drop Down Tabs Menu- Author: Dynamic Drive (http://www.dynamicdrive.com) //Created: May 16th, 07' var tabdropdown={ disappeardelay: 200, //set delay in miliseconds before menu disappears onmouseout disablemenuclick: false, //when user clicks on a menu item with a drop down menu, disable menu item's link? enableiframeshim: 1, //1 or 0, for true or false //No need to edit beyond here//////////////////////// dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, previousmenuitem:null, currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/) 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; }, showhide:function(obj, e, obj2){ //obj refers to drop down menu, obj2 refers to tab menu item mouse is currently over 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 (obj2.parentNode.className.indexOf("default")==-1) //if tab isn't a default selected one obj2.parentNode.className="selected" 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.standardbody.scrollLeft+this.standardbody.clientWidth-15 : window.pageXOffset+window.innerWidth-15 this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure) //move menu to the left? edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth } else{ var topedge=this.ie && !window.opera? this.standardbody.scrollTop : window.pageYOffset var windowedge=this.ie && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18 this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){ //move up? edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either? edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge } this.dropmenuobj.firstlink.style.borderTopWidth=(edgeoffset==0)? 0 : "1px" //Add 1px top border to menu if dropping up } return edgeoffset }, dropit:function(obj, e, dropmenuID){ if (this.dropmenuobj!=null){ //hide previous menu this.dropmenuobj.style.visibility="hidden" //hide menu if (this.previousmenuitem!=null && this.previousmenuitem!=obj){ if (this.previousmenuitem.parentNode.className.indexOf("default")==-1) //If the tab isn't a default selected one this.previousmenuitem.parentNode.className="" } } this.clearhidemenu() if (this.ie||this.firefox){ obj.onmouseout=function(){tabdropdown.delayhidemenu(obj)} obj.onclick=function(){return !tabdropdown.disablemenuclick} //disable main menu item link onclick? this.dropmenuobj=document.getElementById(dropmenuID) this.dropmenuobj.onmouseover=function(){tabdropdown.clearhidemenu()} this.dropmenuobj.onmouseout=function(e){tabdropdown.dynamichide(e, obj)} this.dropmenuobj.onclick=function(){tabdropdown.delayhidemenu(obj)} this.showhide(this.dropmenuobj.style, e, obj) 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.previousmenuitem=obj //remember main menu item mouse moved out from (and into current menu item) this.positionshim() //call iframe shim function } }, contains_firefox:function(a, b) { while (b.parentNode) if ((b = b.parentNode) == a) return true; return false; }, dynamichide:function(e, obj2){ //obj2 refers to tab menu item mouse is currently over var evtobj=window.event? window.event : e if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement)) this.delayhidemenu(obj2) else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget)) this.delayhidemenu(obj2) }, delayhidemenu:function(obj2){ this.delayhide=setTimeout(function(){tabdropdown.dropmenuobj.style.visibility='hidden'; if (obj2.parentNode.className.indexOf('default')==-1) obj2.parentNode.className=''},this.disappeardelay) //hide menu }, clearhidemenu:function(){ if (this.delayhide!="undefined") clearTimeout(this.delayhide) }, positionshim:function(){ //display iframe shim 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' }, isSelected:function(menuurl){ var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "") return (tabdropdown.currentpageurl==menuurl) }, init:function(menuid, dselected){ this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes var menuitems=document.getElementById(menuid).getElementsByTagName("a") for (var i=0; i<menuitems.length; i++){ if (menuitems[i].getAttribute("rel")){ var relvalue=menuitems[i].getAttribute("rel") document.getElementById(relvalue).firstlink=document.getElementById(relvalue).getElementsByTagName("a")[0] menuitems[i].onmouseover=function(e){ var event=typeof e!="undefined"? e : window.event tabdropdown.dropit(this, event, this.getAttribute("rel")) } } if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[i].href)){ menuitems[i].parentNode.className+=" selected default" var setalready=true } else if (parseInt(dselected)==i) menuitems[i].parentNode.className+=" selected default" } } }