var ddtabmenu={
        disabletablinks: false, //Disable hyperlinks in 1st level tabs with sub contents (true or false)?
        snap2original: [true, 300], // czas po jakim menu wróci do stanu pierwotnego po zdjęciu kursora z menu

        currentpageurl: window.location.href.replace("http://"+window.location.hostname, "").replace(/^\//, ""), 
definemenu:function(tabid, dselected){
        this[tabid+"-menuitems"]=null
        this[tabid+"-dselected"]=-1
        this.addEvent(window, function(){ddtabmenu.init(tabid, dselected)}, "load")
},

showsubmenu:function(tabid, targetitem){
        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"
},

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){
        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])
                        this[tabid+"-dselected"]=menuitems[x]
                        var setalready=true
                }
                else if (parseInt(dselected)==x){
                        ddtabmenu.showsubmenu(tabid, menuitems[x])
                        this[tabid+"-dselected"]=menuitems[x]
                }
        }
}
}