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Thread: Dropdown menu that moves up on mouseover

  1. #1
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    Default Dropdown menu that moves up on mouseover

    Hi Guys,

    I'm looking for a simple mouseover drop down script like this one:
    http://www.dynamicdrive.com/dynamici...roptabmenu.htm

    Except the rollover effect always has to move up instead of move down.

    Can anyone help me, or help me with editing existing code?

    Cheers.
    Tim

  2. #2
    Join Date
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    Default

    modifications in red
    Code:
    /***********************************************
    * Drop Down Tabs Menu- (c) Dynamic Drive DHTML code library (www.dynamicdrive.com)
    * This notice MUST stay intact for legal use
    * Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
    ***********************************************/
    //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"
    		}
    	}
    
    }
    Vic
    God Loves You and will never love you less.
    http://www.vicsjavascripts.org/Home.htm
    If my post has been useful please donate to http://www.operationsmile.org.uk/

  3. #3
    Join Date
    Nov 2009
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    Default

    Cheers man!

    K.R.

    Tim

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