/******************************************************************************
* alteCmScript.js
*******************************************************************************

*******************************************************************************
*                                                                             *
* Copyright 2006									                          *
*                                                                             *
******************************************************************************/

/*
Initialize and render the MenuBar when its elements are ready 
to be scripted.
*/
isoYUILoader.onReady( function() {

	YAHOO.util.Event.onContentReady("cmHomeMenuTop", 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,
					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.
				*/




				/*
				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];
				nbElement = oUL.childNodes.length;
				heightElement = 43;
				
				
				var strMarginTop = (heightElement * nbElement) - oUL.offsetHeight;
				if(strMarginTop < 0) strMarginTop = 0;
				
				//alert(strMarginTop);
				
				oUL.style.marginTop = strMarginTop + "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) {

			if (this.cfg.getProperty("iframe")) {

				this.syncIframe();

			}
		}


		/*
		"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];

			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,
				oUL;

			if (this.parent) {

				oElement = this.element;
				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.easeOutStrong);

				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.
				*/
			}

		}

		/*
		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("cmHomeMenuTop", {
			autosubmenudisplay: true,
			hidedelay: 3000,
			lazyload: true,
			submenualignment: ["bl","tl"]
			

		});

		/*
		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();

	});
});