var lastMenuId = 0;
var timer;
var mSheets = new Array();
var currZ = 100;
var mReady = false;
var mLeftPos = 326;
var vert = 30;
var initMailMenus = new Array();

var agt = navigator.userAgent.toLowerCase ();
var is_firefox = ((agt.indexOf ("firefox") != -1) && (agt.indexOf ("opera") == -1) && (agt.indexOf ("safari") == -1));

var is_ie = ( /msie/i.test(navigator.userAgent) &&
           !/opera/i.test(navigator.userAgent) );



function MenuLink(textVal, linkVal, subVal){
    this.text = textVal;
    this.action = linkVal;
    this.submenu = subVal;
}

function menuHideAll(){
    for (var c in mSheets) mSheets[c].hide();
}

function menuHideTimerSet(){
    timer = window.setTimeout(menuHideAll, 100);
}

function menuHideTimerReset(){
    if (timer) window.clearTimeout(timer);
}

function menuAddLink(textVal, linkVal){
    this.links[this.links.length] = new MenuLink(textVal, linkVal, null);
}

function menuAddSubmenu(textVal, linkVal){
    this.links[this.links.length] = new MenuLink(textVal, linkVal, new MenuSheet(this));
}

function menuShow(leftVal, topVal){
    this.block.style.left = leftVal + "px";
    this.block.style.top = (topVal+1) + "px";
    this.block.style.display = "block";
    

    if (is_ie)
    {
        if (!this.hider)
            this.hider = this._createHider();
        this._setupHider(this.hider, leftVal, topVal, this.block.offsetWidth, this.block.offsetHeight);
    }


}

function menuHide(){  
    if (is_ie)
        this._closeHider(this.hider);
    this.hideCh();
    this.block.style.display = "none";
}

function menuFlip(leftVal, topVal){
    var disp = this.block.style.display;
    if (disp == "none") this.show(leftVal, topVal);
    else this.hide();
}

function menuHideCh(){
    for (var c in this.links){
        curLink = this.links[c];
        if (curLink.submenu) curLink.submenu.hide();
    }
}

function menuCreate(path){
    var res = "<div class=\"menu-sh\" onmouseout=\"menuHideTimerSet()\" onmouseover=\"menuHideTimerReset()\"><table cellpadding=\"0\" cellspacing=\"0\" class=\"tab-menu-sh\">";
    var curLink;
    var newPath;
    if (path == null) path = "mSheets[" + this.id + "]";
    for (var c in this.links){
        curLink = this.links[c];
        res += "<tr><td class=\"blk-menu-sh";
        if (curLink.submenu) res += " blk-menu-arr";
        res += "\" onmouseover=\"setClass(this, 'blk-menu-sh-act";
        if (curLink.submenu) res += " blk-menu-arr-act";
        res += "'); ";
        res += path + ".hideCh()";
        if (curLink.submenu){
            newPath = path + ".links[" + c + "].submenu";
            res += "; " + newPath + ".show(getLeftPos(this) + this.offsetWidth + 2, getTopPos(this) - 1)";
            curLink.submenu.create(newPath);
        }
        res += "\" onmouseout=\"setClass(this, 'blk-menu-sh";
        if (curLink.submenu) res += " blk-menu-arr";
        res += "')\" onclick=\"gotoURL('"+curLink.action+"')\" nowrap=\"nowrap\">" + curLink.text + "</td></tr>";
    }
    res += "</table></div>";
    this.block.innerHTML = res;
    this.block.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=90)";
}


function MenuSheet(parentObj){
    this.links = new Array();
    this.addLink = menuAddLink;
    this.addSubmenu = menuAddSubmenu;
    this.create = menuCreate;
    this.show = menuShow;
    this.hide = menuHide;
    this.flip = menuFlip;
    this.hideCh = menuHideCh;
    this.id = lastMenuId;
    lastMenuId++;
    this.parent = parentObj; 
    this.block = document.createElement("DIV");
    this.block.className = "blk-menu";
    this.block.style.position = "absolute";
    this.block.style.display = "none";
    this.block.style.zIndex = currZ;
    currZ++;
    this.block.id = "ms" + this.id;
    document.body.appendChild(this.block);
    
}

function showMenu(objVal, numVal){
    if (mReady){
        menuHideAll();
        if ( is_firefox ) {
            vert = 22;
        } else {
            vert = 22;
        }
        mSheets[numVal].show(getLeftPos(objVal), getTopPos(objVal) + vert);
        menuHideTimerReset();
    }
}

function hideMenu(objVal, numVal){
    if (mReady){
        menuHideTimerSet();
    }
}       

MenuSheet.prototype._createHider = function ()
{
    var f=null;
    var filter = 'filter:progid:DXImageTransform.Microsoft.alpha(style=0,opacity=0);';
    var id = 'dynarch-menu-hider-' + (this.id);
    window.self.document.body.insertAdjacentHTML('beforeEnd', '<iframe id="'+id+'" scroll="no" frameborder="0" '+'style="position:absolute;visibility:hidden;'+filter+'border:0;top:0;left:0;width:0;height:0;" '+'src="javascript:false;"></iframe>');
    f = window.self.document.getElementById(id);
    return f;
};   

MenuSheet.prototype._setupHider = function (f, x, y, w, h)
{
    if (f)
    {
        var s=f.style;
        s.left=x+"px";
        s.top=y+"px";
        s.width=w+"px";
        s.height=h+"px";
        s.visibility="visible";
    }
};         

MenuSheet.prototype._closeHider = function (f)
{
    if (f)
        f.style.visibility="hidden";
};

function createMailMenus()
{
     for (var c in initMailMenus)
     {
          eval(initMailMenus[c]);
     }

     mReady = true;
}