var banner = '<br><br><br>';
banner = '<img src=\'http://loinoihay.net/wp-content/uploads/2016/03/nhung-bai-tho-sieu-hay-sieu-cam-dong-danh-tang-ngay-quoc-te-phu-nu-83-3.jpg\' style=\'max-width:450px;\'>'
function showbanner(div){
	 
	document.getElementById(div).innerHTML = banner;
}