YAHOO.util.Event.onContentReady("mpcdropdown", function () {
    var ua = YAHOO.env.ua,
        oAnim;  // Animation instance
    function onSubmenuBeforeShow(p_sType, p_sArgs) {
        var oBody,
            oElement,
            oShadow,
            oUL;
        if (this.parent) {
            oElement = this.element;
            oShadow = oElement.lastChild;
            oShadow.style.height = "0px";
            if (oAnim && oAnim.isAnimated()) {
                oAnim.stop();
                oAnim = null;
            }
            oBody = this.body;
            if (this.parent && 
                !(this.parent instanceof YAHOO.widget.MenuBarItem)) {
                if (ua.gecko || ua.opera) {
                    oBody.style.width = oBody.clientWidth + "px";
                }
                if (ua.ie == 7) {
                    oElement.style.width = oElement.clientWidth + "px";
                }
            }
            oBody.style.overflow = "hidden";
            oUL = oBody.getElementsByTagName("ul")[0];
            oUL.style.marginTop = ("-" + oUL.offsetHeight + "px");
        }
        var oParent = this.parent;
        if (oParent && oParent instanceof YAHOO.widget.MenuBarItem) { 
           this.cfg.setProperty("zindex", 10); 
        }
    }
    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";
        }
    }
    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 = "";
        if (this.parent && 
            !(this.parent instanceof YAHOO.widget.MenuBarItem)) {
            if (ua.gecko || ua.opera) {
                oBody.style.width = "";
            }
            if (ua.ie == 7) {
                this.element.style.width = "";
            }
        }
    }
    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];
            oAnim = new YAHOO.util.Anim(oUL, 
                { marginTop: { to: 0 } },
                .5, YAHOO.util.Easing.easeOut);
            oAnim.onStart.subscribe(function () {
                oShadow.style.height = "100%";
            });
            oAnim.animate();
            if (YAHOO.env.ua.ie) {
                oShadow.style.height = oElement.offsetHeight + "px";
                oAnim.onTween.subscribe(onTween, oShadow, this);
            }
            oAnim.onComplete.subscribe(onAnimationComplete, oShadow, this);
        }
    }
    var oMenuBar = new YAHOO.widget.MenuBar("mpcdropdown", { 
                                                autosubmenudisplay: true, 
                                                hidedelay: 750, 
                                                lazyload: true });
    oMenuBar.subscribe("beforeShow", onSubmenuBeforeShow);
    oMenuBar.subscribe("show", onSubmenuShow);
    oMenuBar.render();          
});