/*
             Initialize and render the MenuBar when its elements are ready 
             to be scripted.
        */

        YAHOO.util.Event.onContentReady("productsandservices", function () {

            var ua = YAHOO.env.ua,
                oAnim;  // Animation instance


            /*
                 "beforeshow" event handler for each submenu of the MenuBar
                 instance, used to setup certain style properties before
                 the menu is animated.
            */

            function onSubmenuBeforeShow(p_sType, p_sArgs) {

                var oBody,
                    oElement,
                    oShadow,
                    oUL;
            

                if (this.parent) {

                    oElement = this.element;

                    /*
                         Get a reference to the Menu's shadow element and 
                         set its "height" property to "0px" to syncronize 
                         it with the height of the Menu instance.
                    */

                    oShadow = oElement.lastChild;
                    oShadow.style.height = "0px";

                    
                    /*
                        Stop the Animation instance if it is currently 
                        animating a Menu.
                    */ 
                
                    if (oAnim && oAnim.isAnimated()) {
                    
                        oAnim.stop();
                        oAnim = null;
                    
                    }


                    /*
                        Set the body element's "overflow" property to 
                        "hidden" to clip the display of its negatively 
                        positioned <ul> element.
                    */ 

                    oBody = this.body;


                    //  Check if the menu is a submenu of a submenu.

                    if (this.parent && 
                        !(this.parent instanceof YAHOO.widget.MenuBarItem)) {
                    

                        /*
                            There is a bug in gecko-based browsers and Opera where 
                            an element whose "position" property is set to 
                            "absolute" and "overflow" property is set to 
                            "hidden" will not render at the correct width when
                            its offsetParent's "position" property is also 
                            set to "absolute."  It is possible to work around 
                            this bug by specifying a value for the width 
                            property in addition to overflow.
                        */

                        if (ua.gecko || ua.opera) {
                        
                            oBody.style.width = oBody.clientWidth + "px";
                        
                        }
                        
                        
                        /*
                            Set a width on the submenu to prevent its 
                            width from growing when the animation 
                            is complete.
                        */
                        
                        if (ua.ie == 7) {

                            oElement.style.width = oElement.clientWidth + "px";

                        }
                    
                    }


                    oBody.style.overflow = "hidden";


                    /*
                        Set the <ul> element's "marginTop" property 
                        to a negative value so that the Menu's height
                        collapses.
                    */ 

                    oUL = oBody.getElementsByTagName("ul")[0];

                    oUL.style.marginTop = ("-" + oUL.offsetHeight + "px");
                
                }

            }


            /*
                "tween" event handler for the Anim instance, used to 
                syncronize the size and position of the Menu instance's 
                shadow and iframe shim (if it exists) with its 
                changing height.
            */

            function onTween(p_sType, p_aArgs, p_oShadow) {

                if (this.cfg.getProperty("iframe")) {
                
                    this.syncIframe();
            
                }
            
                if (p_oShadow) {
            
                    p_oShadow.style.height = this.element.offsetHeight + "px";
                
                }
            
            }


            /*
                "complete" event handler for the Anim instance, used to 
                remove style properties that were animated so that the 
                Menu instance can be displayed at its final height.
            */

            function onAnimationComplete(p_sType, p_aArgs, p_oShadow) {

                var oBody = this.body,
                    oUL = oBody.getElementsByTagName("ul")[0];

                if (p_oShadow) {
                
                    p_oShadow.style.height = this.element.offsetHeight + "px";
                
                }


                oUL.style.marginTop = "";
                oBody.style.overflow = "";
                

                //  Check if the menu is a submenu of a submenu.

                if (this.parent && 
                    !(this.parent instanceof YAHOO.widget.MenuBarItem)) {


                    // Clear widths set by the "beforeshow" event handler

                    if (ua.gecko || ua.opera) {
                    
                        oBody.style.width = "";
                    
                    }
                    
                    if (ua.ie == 7) {

                        this.element.style.width = "";

                    }
                
                }
                
            }


            /*
                 "show" event handler for each submenu of the MenuBar 
                 instance - used to kick off the animation of the 
                 <ul> element.
            */

            function onSubmenuShow(p_sType, p_sArgs) {

                var oElement,
                    oShadow,
                    oUL;
            
                if (this.parent) {

                    oElement = this.element;
                    oShadow = oElement.lastChild;
                    oUL = this.body.getElementsByTagName("ul")[0];
                

                    /*
                         Animate the <ul> element's "marginTop" style 
                         property to a value of 0.
                    */

                    oAnim = new YAHOO.util.Anim(oUL, 
                        { marginTop: { to: 0 } },
                        .5, YAHOO.util.Easing.easeOut);


                    oAnim.onStart.subscribe(function () {
    
                        oShadow.style.height = "100%";
                    
                    });


                    oAnim.animate();


                    /*
                        Subscribe to the Anim instance's "tween" event for 
                        IE to syncronize the size and position of a 
                        submenu's shadow and iframe shim (if it exists)  
                        with its changing height.
                    */

                    if (YAHOO.env.ua.ie) {
                        
                        oShadow.style.height = oElement.offsetHeight + "px";


                        /*
                            Subscribe to the Anim instance's "tween"
                            event, passing a reference Menu's shadow 
                            element and making the scope of the event 
                            listener the Menu instance.
                        */

                        oAnim.onTween.subscribe(onTween, oShadow, this);

                    }


                    /*
                        Subscribe to the Anim instance's "complete" event,
                        passing a reference Menu's shadow element and making 
                        the scope of the event listener the Menu instance.
                    */

                    oAnim.onComplete.subscribe(onAnimationComplete, oShadow, this);
                
                }
            
            }


            /*
                 Instantiate a MenuBar:  The first argument passed to the 
                 constructor is the id of the element in the page 
                 representing the MenuBar; the second is an object literal 
                 of configuration properties.
            */

            var oMenuBar = new YAHOO.widget.MenuBar("productsandservices", { 
                                                        autosubmenudisplay: true, 
                                                        hidedelay: 750, 
                                                        lazyload: true });


            /*
                 Subscribe to the "beforeShow" and "show" events for 
                 each submenu of the MenuBar instance.
            */
            
            oMenuBar.subscribe("beforeShow", onSubmenuBeforeShow);
            oMenuBar.subscribe("show", onSubmenuShow);


            /*
                 Call the "render" method with no arguments since the 
                 markup for this MenuBar already exists in the page.
            */

            oMenuBar.render();          
        
        });