/*
     Initialize and render the MenuBar when its elements are ready 
     to be scripted.
*/
YAHOO.util.Event.onContentReady("mainMenu", 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";

                }
				
            
            }
			else{
				if(ua.ie ==6)
				oElement.style.width = "120px";
			}

            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("mainMenu", { 
        autosubmenudisplay: true, 
        hidedelay: 750, 
		showdelay:50,
        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();          

});


/**
 * Display teasers on home page
 */ 
YAHOO.util.Event.onContentReady("carouselTeasers", function () {

    var carousel = new YAHOO.widget.Carousel("carouselTeasers", {
        animation: { speed: 0.5 },
        isCircular: true,
        navigation: { prev: 'showPrevious', next: 'showNext' },
        scrollIncrement: 1,
        numVisible: 1,
        selectOnScroll: false
    });

    carousel.render();
    carousel.show();
    
    // attach click listeners on custom navigation buttons  
    YAHOO.util.Event.on('showPrevious', 'click', function () { carousel.scrollBackward(); });
    YAHOO.util.Event.on('showNext', 'click', function () { carousel.scrollForward(); });
    
});