function addTopBanner(){
			function addCloseButton(){
				$D.setStyle($('close-topbanner'),'display','block');
				$E.on($('close-topbanner'),'click',function(){
					if(YAHOO.env.ua.gecko ){
						$D.setStyle($('topbanner'),'height',0);
					}else{
						var closeBannerAnim = new YAHOO.util.Anim('topbanner', {height: {to: 0}}, 1, $Y.Easing.easeOutStrong);
						closeBannerAnim.animate();				
					}
				});
			}
			setTimeout(function(){
				var adv0 = document.createElement('div');
				adv0.id = 'topbanner';
				adv0.innerHTML = '<iframe id="advn0" marginheight="0" marginwidth="0" frameborder="0" width="952" height="32" scrolling="no" src="http://www.alibado.com/topbanner.html?iframe_delete=true">\n'	
				adv0.innerHTML += '<noscript><a href="http://www.alibado.com/sitemap.html"><img src="http://img.china.alibaba.com/news/upload/!/952-32_1258508761958.gif" width="952" height="32" border="0" /></a></noscript>\n'
	            adv0.innerHTML += '</iframe>\n';
				adv0.innerHTML += '<div class="icon-bg" id="close-topbanner">关闭</div>\n'
				$D.insertBefore(adv0, $('header'));
				if(YAHOO.env.ua.gecko ){
					$D.setStyle(adv0,'height',32+'px');
					addCloseButton();
				}else{
					var startBannerAnim = new YAHOO.util.Anim('topbanner', {height: {to: 32}}, 1, $Y.Easing.easeOutStrong);
					startBannerAnim.onComplete.subscribe(addCloseButton);
					startBannerAnim.animate();				
				}
			},1000);
		}