var loader = new YAHOO.util.YUILoader({
    require: ['animation', 'cookie'],
    loadOptional: true,
    onSuccess: function() {
	    YAHOO.util.Event.onDOMReady(function (ev) {
			if ( YAHOO.util.Cookie.get('visited') )
				return false;
			
			YAHOO.util.Dom.setStyle('zoom-overlay', 'opacity', 0);
			YAHOO.util.Dom.setStyle('zoom-overlay', 'display', 'block');
			YAHOO.util.Dom.setX('zoom-overlay', 0);
			YAHOO.util.Dom.setY('zoom-overlay', 0);
			YAHOO.util.Dom.setStyle('zoom-overlay', 'width', YAHOO.util.Dom.getDocumentWidth());
			YAHOO.util.Dom.setStyle('zoom-overlay', 'height', YAHOO.util.Dom.getDocumentHeight());
			YAHOO.util.Dom.setStyle('zoom-overlay', 'display', 'none');
		
			
			YAHOO.util.Dom.setStyle('zoom-overlay', 'display', 'block');
			YAHOO.util.Dom.setStyle('zoom-container', 'visibility', 'hidden');
			YAHOO.util.Dom.setStyle('zoom-container', 'display', 'block');
			YAHOO.util.Dom.setX('zoom-container', (Math.round(YAHOO.util.Dom.getViewportWidth() / 2) - 250));
			y  = YAHOO.util.Dom.getDocumentScrollTop();
			y += Math.round(YAHOO.util.Dom.getViewportHeight() / 2);
			y -= (Math.round((YAHOO.util.Dom.getRegion('zoom-container').bottom - YAHOO.util.Dom.getRegion('zoom-container').top) / 2));
			YAHOO.util.Dom.setY('zoom-container', (y));
			if (YAHOO.util.Dom.getRegion('layout-header').bottom > YAHOO.util.Dom.getRegion('zoom-container').top ) {
				YAHOO.util.Dom.setY('zoom-container', YAHOO.util.Dom.getRegion('layout-header').bottom + 20);
			} else if (YAHOO.util.Dom.getDocumentHeight() < YAHOO.util.Dom.getRegion('zoom-container').bottom ) {
				y  = YAHOO.util.Dom.getDocumentHeight();
				y += YAHOO.util.Dom.getRegion('zoom-container').bottom;
				y -= YAHOO.util.Dom.getRegion('zoom-container').top;
				YAHOO.util.Dom.setY('zoom-container', y);
			}
			var anim = new YAHOO.util.Anim('zoom-overlay', {opacity: { to: .5 }}, .25, YAHOO.util.Easing.easeIn);
			anim.onComplete.subscribe(function(e) {
				YAHOO.util.Dom.setStyle('zoom-container', 'visibility', 'visible')
			});
			anim.animate();
			
			YAHOO.util.Event.addListener('zoom-close', 'click', function (e) {
				var anim = new YAHOO.util.Anim('zoom-overlay', {opacity: { to: 0 }}, .25, YAHOO.util.Easing.easeOut);
				YAHOO.util.Dom.setStyle('zoom-container', 'display', 'none');
				anim.onComplete.subscribe(function(e) {
					YAHOO.util.Dom.setStyle('zoom-overlay', 'display', 'none');
				});
				anim.animate();
			});
			
			YAHOO.util.Event.addListener('zoom-overlay', 'click', function (e) {
				var anim = new YAHOO.util.Anim('zoom-overlay', {opacity: { to: 0 }}, .25, YAHOO.util.Easing.easeOut);
				YAHOO.util.Dom.setStyle('zoom-container', 'display', 'none');
				anim.onComplete.subscribe(function(e) {
					YAHOO.util.Dom.setStyle('zoom-overlay', 'display', 'none');
				});
				anim.animate();
			});
			
			YAHOO.util.Cookie.set('visited', true); 
		});
    },
    timeout: 1000,
    combine: true
});

loader.insert();