// support functions for menu pages

function menuInitialize(tid,did) {
    ddtreemenu.createTree(tid,true);
    ddtreemenu.flatten(tid,'contract');

    var o = document.getElementById(tid);
    o.style.visibility = 'visible';
    resizeMenuDiv(did);
}

function resizeMenuDiv(did) {
    var w = (document.body.scrollWidth > document.body.clientWidth ?
        document.body.scrollWidth : document.body.clientWidth);
    var d = document.getElementById(did);
    d.style.width = w+'px';
}

function dspLink(e) {
    var m = parent.main;
    m.location.replace(e.href);
    return false;
}

function updStatus(e) {
    status = 'Click to view the '+e.innerText+' link';
    return true;
}

function clrStatus() {
    status = '';
    return true;
}


// All remaining functions taked from simpletreemenu.js

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

ddtreemenu.closefolder = "/img/closed.gif"; //set image path to "closed" folder image
ddtreemenu.openfolder  = "/img/open.gif";   //set image path to "open" folder image

//////////No need to edit beyond here///////////////////////////

ddtreemenu.createTree = function(treeid, enablepersist, persistdays) {
    var ultags = document.getElementById(treeid).getElementsByTagName("ul");
    if (typeof persisteduls[treeid] == "undefined")
        persisteduls[treeid] = (enablepersist == true && ddtreemenu.getCookie(treeid)!="")? ddtreemenu.getCookie(treeid).split(",") : "";
    for (var i=0; i<ultags.length; i++)
        ddtreemenu.buildSubTree(treeid, ultags[i], i);
    if (enablepersist == true) { //if enable persist feature
        var durationdays = (typeof persistdays == "undefined")? 1 : parseInt(persistdays);
        ddtreemenu.dotask(window, function() { ddtreemenu.rememberstate(treeid, durationdays) }, "unload"); //save opened UL indexes on body unload
    }
}

ddtreemenu.buildSubTree = function(treeid, ulelement, index) {
    ulelement.parentNode.className = "submenu";
    if (typeof persisteduls[treeid] == "object") { //if cookie exists (persisteduls[treeid] is an array versus "" string)
        if (ddtreemenu.searcharray(persisteduls[treeid], index)) {
            ulelement.setAttribute("rel", "open");
            ulelement.style.display = "block";
            ulelement.parentNode.style.backgroundImage = "url("+ddtreemenu.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"
        ddtreemenu.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];
        if (submenu.getAttribute("rel") == "closed") {
            submenu.style.display = "block";
            submenu.setAttribute("rel", "open");
            ulelement.parentNode.style.backgroundImage = "url("+ddtreemenu.openfolder+")";
        }
        else if (submenu.getAttribute("rel") == "open") {
            submenu.style.display = "none";
            submenu.setAttribute("rel", "closed");
            ulelement.parentNode.style.backgroundImage = "url("+ddtreemenu.closefolder+")";
        }
        ddtreemenu.preventpropagate(e);
    }
    
    ulelement.onclick = function(e) {
        ddtreemenu.preventpropagate(e);
    }
}

ddtreemenu.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("+ddtreemenu.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("+ddtreemenu.openfolder+")";
        }
        currentnode=currentnode.parentNode;
    }
}

ddtreemenu.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("+ddtreemenu.openfolder+")" : "url("+ddtreemenu.closefolder+")";
    }
}

ddtreemenu.rememberstate = function(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
    ddtreemenu.setCookie(treeid, openuls.join(","), durationdays); //populate cookie with value treeid=1,2,3 etc (where 1,2... are the indexes of the opened ULs)
}

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

ddtreemenu.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 ""
}

ddtreemenu.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=/";
}

ddtreemenu.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;
}

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

ddtreemenu.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);
}