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(/^\//, ""), 

    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"
        }
    }

}