拉伸收缩广告

<style>
	.chunjie-ad{ background: url("templates/default/images/ad.jpg") center no-repeat #bc0b08; background-size:cover }
	</style>
	<div class="chunjie-ad"></div>
	<script>
	$('.chunjie-ad').height($(window).height());
	function chunjie_ad(){
	$('.chunjie-ad').slideUp(1000);
	}
	setTimeout('chunjie_ad()',3000);
	</script>