/*0.2153
                 Initialize and render the MenuBar when its elements are ready 
                 to be scripted.
            */

            YAHOO.util.Event.onContentReady("main-nav", function () {

                var Dom = YAHOO.util.Dom,
                    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,
                        oShadow,
                        oUL;
                

                    if (this.parent) {

                        /*
                             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 = this.element.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;


                        /*
                            There is a bug in gecko-based browsers 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 (this.parent && 
                            !(this.parent instanceof YAHOO.widget.MenuBarItem) && 
                            YAHOO.env.ua.gecko) {

                            Dom.setStyle(oBody, "width", (oBody.clientWidth + "px"));
                        
                        }
    

                        Dom.setStyle(oBody, "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];

                        Dom.setStyle(oUL, "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";
                    
                    }

                    Dom.setStyle(oUL, "marginTop", "");
                    Dom.setStyle(oBody, "overflow", "");
                    

                    if (this.parent && 
                        !(this.parent instanceof YAHOO.widget.MenuBarItem) && 
                        YAHOO.env.ua.gecko) {
                    
                        Dom.setStyle(oBody, "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("main-nav", { 
                                                            autosubmenudisplay: true, 
                                                            hidedelay: 750, 
                                                            lazyload: true,
                                                            submenualignment: ["tr","br"] });


                /*
                     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();            
            
            });