//var persisteduls=new Object()
//var ddtreemenu=new Object()

//ddtreemenu.closefolder="/Wex9/images/mytree/closed.gif" //set image path to "closed" folder image
//ddtreemenu.openfolder="/Wex9/images/mytree/open.gif" //set image path to "open" folder image


var closefolder="/Wex9/images/mytree/closed.gif" //set image path to "closed" folder image
var openfolder="/Wex9/images/mytree/open.gif" //set image path to "open" folder image
//////////No need to edit beyond here///////////////////////////

function RTree() {
    this.persisteduls=new Object()
//var closefolder="/Wex9/images/mytree/closed.gif" //set image path to "closed" folder image
//var openfolder="/Wex9/images/mytree/open.gif" //set image path to "open" folder image

}



RTree.prototype.createTree=function(treeid, enablepersist, persistdays){
    
    var ultags=document.getElementById(treeid).getElementsByTagName("ul")
    
    if (typeof this.persisteduls[treeid]=="undefined") {
        //this.persisteduls[treeid]=(enablepersist==true && getCookie(treeid)!="")? getCookie(treeid).split(",") : ""

        if(enablepersist==true && this.getCookie(treeid)!="") {
            this.persisteduls[treeid]=this.getCookie(treeid).split(",") //getCookie(treeid).split(",")
        }
        else {
            this.persisteduls[treeid]=""
        }
    }

    for (var i=0; i<ultags.length; i++) {
        this.buildSubTree(treeid, ultags[i], i)
    }
    if (enablepersist==true){ //if enable persist feature
        var durationdays=(typeof persistdays=="undefined")? 1 : parseInt(persistdays)
        this.dotask(window, function(){
            rememberstate(treeid, durationdays)
        }, "unload") //save opened UL indexes on body unload
    }
    
    
}

RTree.prototype.buildSubTree=function(treeid, ulelement, index){
    
    ulelement.parentNode.className="submenu"
    if (typeof this.persisteduls[treeid]=="object"){ //if cookie exists (persisteduls[treeid] is an array versus "" string)
        if (this.searcharray(this.persisteduls[treeid], index)){
            ulelement.setAttribute("rel", "open")
            ulelement.style.display="block"
            ulelement.parentNode.style.backgroundImage="url("+openfolder+")"
        }
        else
            ulelement.setAttribute("rel", "closed")
    } //end cookie persist code
    else if (ulelement.getAttribute("rel")==null || ulelement.getAttribute("rel")==false) //if no cookie and UL has NO rel attribute explicted added by user
        ulelement.setAttribute("rel", "closed")
    else if (ulelement.getAttribute("rel")=="open") //else if no cookie and this UL has an explicit rel value of "open"
        this.expandSubTree(treeid, ulelement) //expand this UL plus all parent ULs (so the most inner UL is revealed!)

    ulelement.parentNode.onclick=function(e){
        var submenu=this.getElementsByTagName("ul")[0] //this.
        if (submenu.getAttribute("rel")=="closed"){
            submenu.style.display="block"
            submenu.setAttribute("rel", "open")
            ulelement.parentNode.style.backgroundImage="url("+openfolder+")"
        }
        else if (submenu.getAttribute("rel")=="open"){
            submenu.style.display="none"
            submenu.setAttribute("rel", "closed")
            ulelement.parentNode.style.backgroundImage="url("+closefolder+")"
        }
        preventpropagate(e)
    }
    
    ulelement.onclick=function(e){
        preventpropagate(e)
    }
}

RTree.prototype.expandSubTree=function(treeid, ulelement){ //expand a UL element and any of its parent ULs
    var rootnode=document.getElementById(treeid)
    var currentnode=ulelement
    currentnode.style.display="block"
    currentnode.parentNode.style.backgroundImage="url("+openfolder+")"
    while (currentnode!=rootnode){
        if (currentnode.tagName=="UL"){ //if parent node is a UL, expand it too
            currentnode.style.display="block"
            currentnode.setAttribute("rel", "open") //indicate it's open
            currentnode.parentNode.style.backgroundImage="url("+openfolder+")"
        }
        currentnode=currentnode.parentNode
    }
}

RTree.prototype.expandSubTree2=function(treeid, ulelement){ //expand a UL element and any of its parent ULs
    var rootnode=document.getElementById(treeid)
    var currentnode=document.getElementById(ulelement)

    this.closeAllEl(treeid)
    
    if(currentnode != null) {
        /*
        if (currentnode.tagName=="UL"){
            currentnode.style.display="block"
            currentnode.parentNode.style.backgroundImage="url("+openfolder+")"
        }
        */
        while (currentnode!=rootnode){
            if (currentnode.tagName=="UL"){ //if parent node is a UL, expand it too
                currentnode.style.display="block"
                currentnode.setAttribute("rel", "open") //indicate it's open
                currentnode.parentNode.style.backgroundImage="url("+openfolder+")"
            }
            currentnode=currentnode.parentNode
        }
        
    }
}

RTree.prototype.closeAllEl=function(treeid){ //rrr based on flatten
    var ultags=document.getElementById(treeid).getElementsByTagName("ul")
    for (var i=0; i<ultags.length; i++){
        ultags[i].style.display="none"
        var relvalue= "closed" /*(action=="expand")? "open" : "closed" */
        ultags[i].setAttribute("rel", relvalue)

        //if(ultags[i].parentNode != null) {
        //    ultags[i].parentNode.style.backgroundImage="" /*"url("+ddtreemenu.closefolder+")"*/
        //}
        
        ultags[i].style.backgroundImage=""

    }
}

RTree.prototype.flatten=function(treeid, action){ //expand or contract all UL elements
    var ultags=document.getElementById(treeid).getElementsByTagName("ul")
    for (var i=0; i<ultags.length; i++){
        ultags[i].style.display=(action=="expand")? "block" : "none"
        var relvalue=(action=="expand")? "open" : "closed"
        ultags[i].setAttribute("rel", relvalue)
        ultags[i].parentNode.style.backgroundImage=(action=="expand")? "url("+openfolder+")" : "url("+closefolder+")"
    }
}

////A few utility functions below//////////////////////

RTree.prototype.getCookie=function(Name){ //get cookie value
    var re=new RegExp(Name+"=[^;]+", "i"); //construct RE to search for target name/value pair
    if (document.cookie.match(re)) //if cookie found
        return document.cookie.match(re)[0].split("=")[1] //return its value
    return ""
}

RTree.prototype.setCookie=function(name, value, days){ //set cookei value
    var expireDate = new Date()
    //set "expstring" to either future or past date, to set or delete cookie, respectively
    var expstring=expireDate.setDate(expireDate.getDate()+parseInt(days))
    document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/";
}

RTree.prototype.searcharray=function(thearray, value){ //searches an array for the entered value. If found, delete value from array
    var isfound=false
    for (var i=0; i<thearray.length; i++){
        if (thearray[i]==value){
            isfound=true
            thearray.shift() //delete this element from array for efficiency sake
            break
        }
    }
    return isfound
}

RTree.prototype.dotask=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)
}

function preventpropagate(e){ //prevent action from bubbling upwards
    if (typeof e!="undefined")
        e.stopPropagation()
    else
        event.cancelBubble=true
}

function setCookie2(name, value, days){ //set cookei value
    var expireDate = new Date()
    //set "expstring" to either future or past date, to set or delete cookie, respectively
    var expstring=expireDate.setDate(expireDate.getDate()+parseInt(days))
    document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()+"; path=/";
}

function rememberstate(treeid, durationdays){ //store index of opened ULs relative to other ULs in Tree into cookie
    var ultags=document.getElementById(treeid).getElementsByTagName("ul")
    var openuls=new Array()
    for (var i=0; i<ultags.length; i++){
        if (ultags[i].getAttribute("rel")=="open")
            openuls[openuls.length]=i //save the index of the opened UL (relative to the entire list of ULs) as an array element
    }

    if (openuls.length==0) //if there are no opened ULs to save/persist
        openuls[0]="none open" //set array value to string to simply indicate all ULs should persist with state being closed
    setCookie2(treeid, openuls.join(","), durationdays) //populate cookie with value treeid=1,2,3 etc (where 1,2... are the indexes of the opened ULs)
}