$(document).ready(function(){
	var banery = new Array ();
	banery[0] = 'img_banner/banner1.jpg';
	banery[1] = 'img_banner/banner2.jpg';
	banery[2] = 'img_banner/banner3.jpg';
	banery[3] = 'img_banner/banner4.jpg';
	banery[4] = 'img_banner/banner5.jpg';
	banery[5] = 'img_banner/banner6.jpg';
	banery[6] = 'img_banner/banner7.jpg';
	banery[7] = 'img_banner/banner8.jpg';
	banery[8] = 'img_banner/banner9.jpg';
	banery[9] = 'img_banner/banner10.jpg';
	banery[10] = 'img_banner/banner11.jpg';
	banery[11] = 'img_banner/banner12.jpg';
	banery[12] = 'img_banner/banner13.jpg';
	banery[13] = 'img_banner/banner14.jpg';
	banery[14] = 'img_banner/banner15.jpg';
	banery[15] = 'img_banner/banner17.jpg';
	banery[16] = 'img_banner/banner18.jpg';
	banery[17] = 'img_banner/banner19.jpg';
	banery[18] = 'img_banner/banner20.jpg';
	banery[19] = 'img_banner/banner21.jpg';
	banery[20] = 'img_banner/banner22.jpg';
	banery[21] = 'img_banner/banner23.jpg';
	banery[22] = 'img_banner/banner24.jpg';
	banery[23] = 'img_banner/banner25.jpg';
	banery[24] = 'img_banner/banner26.jpg';
	banery[25] = 'img_banner/banner27.jpg';
	banery[26] = 'img_banner/banner28.jpg';
	banery[27] = 'img_banner/banner29.jpg';
	banery[28] = 'img_banner/banner30.jpg';
	banery[29] = 'img_banner/banner31.jpg';
	$("body").prepend('<div id="bannerwin"><a href="#" id="closeBannerwin">x</a></div>');
	var bannerwin = $("#bannerwin");
	var img = new Image();
	img.src = banery[Math.floor(Math.random()*28)];
	$(img).load(function(){
		bannerwin.css({width:img.width + "px", height:img.height + "px", background:"url('" + img.src + "')", left: (($(window).width()/2)-(img.width/2))+"px"}).animate({top: '+=480px'}, 1000).animate({top: '-=30px'}, 300);
	});
	$("#bannerwin a").click(function(){
		bannerwin.animate({top: '+=100px',opacity: "0"}, 500, function(){bannerwin.remove()});
		return false;
	});
});