//DD Tab Menu- Script rewritten April 27th, 07: http://www.dynamicdrive.com
//**Updated Feb 23rd, 08): Adds ability for menu to revert back to default selected tab when mouse moves out of menu

//Only 2 configuration variables below:

var ddtabmenu={
    disabletablinks: false, //Disable hyperlinks in 1st level tabs with sub contents (true or false)?
    snap2original: [true, 300], //Should tab revert back to default selected when mouse moves out of menu? ([true/false, delay_millisec]

    currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), //get current page url (minus hostname, ie: http://www.dynamicdrive.com/)

    definemenu:function(tabid, dselected,sselected){
        this[tabid+"-menuitems"]=null
        this[tabid+"-dselected"]=-1
        this.addEvent(window, function(){
            ddtabmenu.init(tabid, dselected,sselected)
            }, "load")
    },

    showsubmenu:function(tabid, targetitem,sselected){
        var menuitems=this[tabid+"-menuitems"]
        this.clearrevert2default(tabid)
        for (i=0; i<menuitems.length; i++){
            menuitems[i].className=""
            if (typeof menuitems[i].hasSubContent!="undefined")
                document.getElementById(menuitems[i].getAttribute("rel")).style.display="none"
        }
        targetitem.className="current"
        if (typeof targetitem.hasSubContent!="undefined")
            document.getElementById(targetitem.getAttribute("rel")).style.display="block"
             if ((targetitem.getAttribute("rel")!="sb0")&& (sselected!=""))
         if(document.getElementById(sselected))   document.getElementById(sselected).style.textDecoration="underline"

    },

    isSelected:function(menuurl){
        var menuurl=menuurl.replace("http://"+menuurl.hostname, "").replace(/^\//, "")
        return (ddtabmenu.currentpageurl==menuurl)
    },

    isContained:function(m, e){
        var e=window.event || e
        var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
        while (c && c!=m)try {
            c=c.parentNode
            } catch(e){
            c=m
            }
        if (c==m)
            return true
        else
            return false
    },

    revert2default:function(outobj, tabid, e){
        if (!ddtabmenu.isContained(outobj, tabid, e)){
            window["hidetimer_"+tabid]=setTimeout(function(){
                ddtabmenu.showsubmenu(tabid, ddtabmenu[tabid+"-dselected"])
            }, ddtabmenu.snap2original[1])
        }
    },

    clearrevert2default:function(tabid){
        if (typeof window["hidetimer_"+tabid]!="undefined")
            clearTimeout(window["hidetimer_"+tabid])
    },

    addEvent:function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
        var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
        if (target.addEventListener)
            target.addEventListener(tasktype, functionref, false)
        else if (target.attachEvent)
            target.attachEvent(tasktype, functionref)
    },

    init:function(tabid, dselected,sselected){
        var menuitems=document.getElementById(tabid).getElementsByTagName("a")
        this[tabid+"-menuitems"]=menuitems
        for (var x=0; x<menuitems.length; x++){
            if (menuitems[x].getAttribute("rel")){
                this[tabid+"-menuitems"][x].hasSubContent=true
                if (ddtabmenu.disabletablinks)
                    menuitems[x].onclick=function(){
                        return false
                        }
                if (ddtabmenu.snap2original[0]==true){
                    var submenu=document.getElementById(menuitems[x].getAttribute("rel"))
                    menuitems[x].onmouseout=function(e){
                     // ddtabmenu.revert2default(submenu, tabid, e)
                        }
                    submenu.onmouseover=function(){
                        ddtabmenu.clearrevert2default(tabid)
                        }
                    submenu.onmouseout=function(e){
                        //ddtabmenu.revert2default(this, tabid, e)
                        }
                }
            }
            else //for items without a submenu, add onMouseout effect
                menuitems[x].onmouseout=function(e){
                    this.className="";
                    if (ddtabmenu.snap2original[0]==true) ddtabmenu.revert2default(this, tabid, e)
                        }
            menuitems[x].onmouseover=function(){
                ddtabmenu.showsubmenu(tabid, this)
                }
            if (dselected=="auto" && typeof setalready=="undefined" && this.isSelected(menuitems[x].href)){
                ddtabmenu.showsubmenu(tabid, menuitems[x],sselected)
                this[tabid+"-dselected"]=menuitems[x]
                var setalready=true
            }
            else if (parseInt(dselected)==x){
                ddtabmenu.showsubmenu(tabid, menuitems[x],sselected)
                this[tabid+"-dselected"]=menuitems[x]

            }
        }
    }
}