function IswaPopupMenu() {
    this.LEFT_MOUSE_BUTTON = 1;
    this.RIGHT_MOUSE_BUTTON = 2;
    this.menuContainer = null;
    this.prevContainer = null;
    this.visible = false;
    this.over = false;
    this.urls = null;
    this.oldcontextMenu = null;
    this.depth = 0;
    this.currentDepth = 0;
    this.leftClickListener = null;
    this.setMenuContainer = function(menuContainer, depth) {
        if (depth != null) {
            this.depth = depth;
        } else {
            this.depth = 0;
        }
        if (this.currentDepth == 0) {
            this.prevContainer = this.menuContainer;
            this.menuContainer = menuContainer;
        }
    }
    this.assignUrls = function(urls) {
        this.urls = urls;
    }
    
    this.goUrl = function(urlIndex) {
        this.hideMenu(this.menuContainer);
        if ((this.urls != null) && (this.urls.length > urlIndex)) {
            var portletUrl = this.urls[urlIndex];
            if (portletUrl != null) {
                self.location = portletUrl;
            }
        }
    }
    this.handleMenuEvents = function(e) {
        if (e == null) {
            e = window.event; // IE
        }
        if (this.currentDepth > 0) {
            this.currentDepth--;
            return;
        }
        if (this.depth > 0) {
            this.currentDepth = this.depth;
            this.depth = 0;
        }
        this.hideMenu(this.prevContainer);
        this.prevContainer = null;
        if ((e.button == this.LEFT_MOUSE_BUTTON) || (e.which == this.LEFT_MOUSE_BUTTON)) {
            if (this.leftClickListener != null) {
                this.leftClickListener();
            }
        }
        if ((e.button == this.RIGHT_MOUSE_BUTTON) || (e.which == this.RIGHT_MOUSE_BUTTON)) {
            this.showMenu(this.menuContainer, e);
        }
    }
    this.handleContextMenu = function(e) {
        return false;
    }
    this.setVisible = function(visible) {
        this.visible = visible;
    }
    this.isVisible = function() {
        return this.visible;
    }
    this.setOver = function(over) {
        this.over = over;
    }
    this.isOver = function() {
        return this.over;
    }
    this.showMenu = function(menuContainerId, e) {
        var element = document.getElementById(menuContainerId);
        if (window.event != null) { // IE
            element.style.left = e.clientX + document.body.scrollLeft;
            element.style.top = e.clientY + document.body.scrollTop;
            element.style.display = "";
        } else { // Mozilla
            element.style.left = e.clientX + window.scrollX;
            element.style.top = e.clientY + window.scrollY;
            element.style.display = "";
        }
        this.setVisible(true);
        return false;
    }
    this.hideMenu = function(menuContainerId) {
        if (menuContainerId == null) {
            menuContainerId = this.menuContainer;
        }
        
        if (menuContainerId != null) {
            document.getElementById(menuContainerId).style.display = "none";
        }
    }
    this.enableDefaultContextMenu = function() {
        document.oncontextmenu = this.oldcontextMenu;
    }
    this.disableDefaultContextMenu = function() {
        this.oldcontextMenu = (typeof(document.oncontextmenu) == "function") ? document.oncontextmenu : null;
        document.oncontextmenu = this.handleContextMenu;
    }
}