menu.js

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    function(p_sType, p_aArgs, p_oSubmenu) {

        var sPropertyName = p_aArgs[0][0];
        var oPropertyValue = p_aArgs[0][1];

        switch(sPropertyName) {

            case "iframe":
            case "constraintoviewport":

                p_oSubmenu.cfg.setProperty(sPropertyName, oPropertyValue);

            break;

        }

    };

/**
* "render" Custom Event handler for a MenuModule instance.  Renders a
* submenu in response to the firing of it's parent's "render" event.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {YAHOO.widget.MenuModule} p_oSubmenu The submenu that subscribed
* to the event.
*/
YAHOO.widget.MenuModule.prototype._onParentMenuModuleRender =

    function(p_sType, p_aArgs, p_oSubmenu) {

        /*
            Set the "constraintoviewport" configuration
            property to match the parent MenuModule
        */

        var oParentMenu = p_oSubmenu.parent.parent;

        var oConfig = {

                constraintoviewport:
                    oParentMenu.cfg.getProperty("constraintoviewport"),

                xy: [0,0]

            };

        /*
            Only sync the "iframe" configuration property if the parent
            MenuModule instance's position is of the same value
        */

        if(
            this.cfg.getProperty("position") ==
            oParentMenu.cfg.getProperty("position")
        ) {

            oConfig.iframe = oParentMenu.cfg.getProperty("iframe");

        }


        p_oSubmenu.cfg.applyConfig(oConfig);


        if(this._oDom.inDocument(this.element)) {

            this.render();

        }
        else {

            this.render(this.parent.element);

        }

    };

/**
* "beforeshow" Custom Event handler for a submenu.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {YAHOO.widget.MenuModule} p_oSubmenu The submenu that fired
* the event.
*/
YAHOO.widget.MenuModule.prototype._onSubmenuBeforeShow =

    function(p_sType, p_aArgs, p_oSubmenu) {

        var oParent = this.parent;
        var aAlignment = oParent.parent.cfg.getProperty("submenualignment");

        this.cfg.setProperty(
            "context",
            [
                oParent.element,
                aAlignment[0],
                aAlignment[1]
            ]
        );

        oParent.submenuIndicator.alt =
            oParent.EXPANDED_SUBMENU_INDICATOR_ALT_TEXT;

    };

/**
* "show" Custom Event handler for a submenu.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {YAHOO.widget.MenuModule} p_oSubmenu The submenu that fired
* the event.
*/
YAHOO.widget.MenuModule.prototype._onSubmenuShow =

    function(p_sType, p_aArgs, p_oSubmenu) {

        var oParent = this.parent;

        oParent.submenuIndicator.alt =
            oParent.EXPANDED_SUBMENU_INDICATOR_ALT_TEXT;

    };

/**
* "hide" Custom Event handler for a submenu.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {YAHOO.widget.MenuModule} p_oSubmenu The submenu that fired
* the event.
*/
YAHOO.widget.MenuModule.prototype._onSubmenuHide =

    function(p_sType, p_aArgs, p_oSubmenu) {

        var oParent = this.parent;

        if(oParent.parent.cfg.getProperty("visible")) {

            oParent.cfg.setProperty("selected", false);

            oParent.focus();

        }

        oParent.submenuIndicator.alt =
            oParent.COLLAPSED_SUBMENU_INDICATOR_ALT_TEXT;

    };

/**
* "focus" YAHOO.util.CustomEvent handler for a MenuModule instance's items.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {Array} p_aObjects Array containing the current MenuModule instance
* and the item that fired the event.
*/
YAHOO.widget.MenuModule.prototype._onItemFocus =

    function(p_sType, p_aArgs, p_aObjects) {

        var me = p_aObjects[0];
        var oItem = p_aObjects[1];

        me.activeItem = oItem;

    };

/**
* "blur" YAHOO.util.CustomEvent handler for a MenuModule instance's items.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {Array} p_aObjects Array containing the current MenuModule instance
* and the item that fired the event.
*/
YAHOO.widget.MenuModule.prototype._onItemBlur =

    function(p_sType, p_aArgs, p_aObjects) {

        var me = p_aObjects[0];
        var oItem = p_aObjects[1];
        var oSubmenu = oItem.cfg.getProperty("submenu");

        if(!oSubmenu || (oSubmenu && !oSubmenu.cfg.getProperty("visible"))) {

            me.activeItem = null;

        }

    };

/**
* "configchange" YAHOO.util.CustomEvent handler for the MenuModule
* instance's items.
* @private
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the
* event was fired.
* @param {Array} p_aObjects Array containing the current MenuModule instance
* and the item that fired the event.
*/
YAHOO.widget.MenuModule.prototype._onItemConfigChange =

    function(p_sType, p_aArgs, p_aObjects) {

        var me = p_aObjects[0];
        var sProperty = p_aArgs[0][0];
        var oItem = p_aObjects[1];

        switch(sProperty) {

            case "submenu":

                var oSubmenu = p_aArgs[0][1];

                if(oSubmenu) {

                    me._configureItemSubmenuModule(oItem);

                }

            break;

            case "text":
            case "helptext":

                /*
                    A change to an item's "text" or "helptext"
                    configuration properties requires the width of the parent
                    MenuModule instance to be recalculated.
                */

                if(me.element.style.width) {

                    var sWidth = me._getOffsetWidth() + "px";

                    me._oDom.setStyle(me.element, "width", sWidth);

                }

            break;

        }

    };

/**
* The default event handler executed when the moveEvent is fired, if the
* "constraintoviewport" configuration property is set to true.
*/
YAHOO.widget.MenuModule.prototype.enforceConstraints =

    function(type, args, obj) {

        var Dom = this._oDom;
        var oConfig = this.cfg;

        var pos = args[0];

        var x = pos[0];
        var y = pos[1];

        var bod = document.getElementsByTagName('body')[0];
        var htm = document.getElementsByTagName('html')[0];

        var bodyOverflow = Dom.getStyle(bod, "overflow");
        var htmOverflow = Dom.getStyle(htm, "overflow");

        var offsetHeight = this.element.offsetHeight;
        var offsetWidth = this.element.offsetWidth;

        var viewPortWidth = Dom.getClientWidth();
        var viewPortHeight = Dom.getClientHeight();

        var scrollX = window.scrollX || document.body.scrollLeft;
        var scrollY = window.scrollY || document.body.scrollTop;

        var topConstraint = scrollY + 10;
        var leftConstraint = scrollX + 10;
        var bottomConstraint = scrollY + viewPortHeight - offsetHeight - 10;
        var rightConstraint = scrollX + viewPortWidth - offsetWidth - 10;

        var aContext = oConfig.getProperty("context");
        var oContextElement = aContext ? aContext[0] : null;


        if (x < 10) {

            x = leftConstraint;

        } else if ((x + offsetWidth) > viewPortWidth) {

            if(
                oContextElement &&
                ((x - oContextElement.offsetWidth) > offsetWidth)
            ) {

                x = (x - (oContextElement.offsetWidth + offsetWidth));

            }
            else {

                x = rightConstraint;

            }

        }

        if (y < 10) {

            y = topConstraint;

        } else if (y > bottomConstraint) {

            if(oContextElement && (y > offsetHeight)) {

                y = ((y + oContextElement.offsetHeight) - offsetHeight);

            }
            else {

                y = bottomConstraint;

            }

        }

        oConfig.setProperty("x", x, true);
        oConfig.setProperty("y", y, true);

    };

// Event handlers for configuration properties

/**
* Event handler for when the "position" configuration property of a
* MenuModule changes.
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {YAHOO.widget.MenuModule} p_oMenuModule The MenuModule instance fired
* the event.
*/
YAHOO.widget.MenuModule.prototype.configPosition =

    function(p_sType, p_aArgs, p_oMenuModule) {

        var sCSSPosition = p_aArgs[0] == "static" ? "static" : "absolute";

        this._oDom.setStyle(this.element, "position", sCSSPosition);

    };

/**
* Event handler for when the "iframe" configuration property of a
* MenuModule changes.
* @param {String} p_sType The name of the event that was fired.
* @param {Array} p_aArgs Collection of arguments sent when the event
* was fired.
* @param {YAHOO.widget.MenuModule} p_oMenuModule The MenuModule instance fired
* the event.
* @see YAHOO.widget.Overlay#configIframe
*/
YAHOO.widget.MenuModule.prototype.configIframe =

    function(p_sType, p_aArgs, p_oMenuModule) {

        if(this.cfg.getProperty("position") == "dynamic") {

            YAHOO.widget.MenuModule.superclass.configIframe.call(
                this,
                p_sType,
                p_aArgs,
                p_oMenuModule
            );

        }

    };

// Public methods

YAHOO.widget.MenuModule.prototype.toString = function() {

    return ("Menu " + this.id);

};

/**
* Sets the title of a group of items.
* @param {String} p_sGroupTitle The title of the group.
* @param {Number} p_nGroupIndex Optional. Number indicating the group to which
* the title belongs.
*/
YAHOO.widget.MenuModule.prototype.setItemGroupTitle =

    function(p_sGroupTitle, p_nGroupIndex) {

        if(typeof p_sGroupTitle == "string" && p_sGroupTitle.length > 0) {

            var Dom = this._oDom;

            var nGroupIndex =
                    typeof p_nGroupIndex == "number" ? p_nGroupIndex : 0;

            var oTitle = this._aGroupTitleElements[nGroupIndex];


            if(oTitle) {

                oTitle.innerHTML = p_sGroupTitle;

            }
            else {

                oTitle = document.createElement(this.GROUP_TITLE_TAG_NAME);

                oTitle.innerHTML = p_sGroupTitle;

                this._aGroupTitleElements[nGroupIndex] = oTitle;

            }


            var i = this._aGroupTitleElements.length - 1;
            var nFirstIndex;

            do {

                if(this._aGroupTitleElements[i]) {

                    Dom.removeClass(
                        this._aGroupTitleElements[i],
                        "first-of-type"
                    );

                    nFirstIndex = i;

                }

            }
            while(i--);


            if(nFirstIndex !== null) {

                Dom.addClass(
                    this._aGroupTitleElements[nFirstIndex],
                    "first-of-type"
                );

            }

        }

    };

/**
* Appends the specified item to a MenuModule instance.
* @param {YAHOO.widget.MenuModuleItem} p_oItem The item to be added.
* @param {Number} p_nGroupIndex Optional. Number indicating the group to which
* the item belongs.
* @return The item that was added to the MenuModule.
* @type YAHOO.widget.MenuModuleItem
*/
YAHOO.widget.MenuModule.prototype.addItem = function(p_oItem, p_nGroupIndex) {

    if(p_oItem) {

        return this._addItemToGroup(p_nGroupIndex, p_oItem);

    }

};

/**
* Inserts an item into a MenuModule instance at the specified index.
* @param {YAHOO.widget.MenuModuleItem} p_oItem The item to be inserted.
* @param {Number} p_nItemIndex Number indicating the ordinal position
* at which the item should be added.
* @param {Number} p_nGroupIndex Optional. Number indicating the group to which
* the item belongs.
* @return The item that was inserted into the MenuModule.
* @type YAHOO.widget.MenuModuleItem
*/
YAHOO.widget.MenuModule.prototype.insertItem =

    function(p_oItem, p_nItemIndex, p_nGroupIndex) {

        if(p_oItem) {

            return this._addItemToGroup(p_nGroupIndex, p_oItem, p_nItemIndex);

        }

    };

/**