function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}
function quangcao(){
//document.getElementById("quangcao");
document.getElementById('popupContact').style.visibility = 'hidden';
document.getElementById('backgroundPopup').style.visibility = 'hidden';}
setTimeout(quangcao, 15000);
		var popup_area = "";
       var linkimg="images/popup.png";
       var linkurl="http://thegioiso.vn/khuyenmai";
	   popup_area += "<div id=\"popupContact\" style=\"position: absolute; top: 157px; left: 460.5px; display: block;\"><a id=\"popupContactClose\" href='javascript:quangcao();'>[X] Đóng lại</a>";
//       popup_area += "<a href="+linkurl+" target=\"_blank\"><img src="+linkimg+" width=530 /></a>";
//       popup_area += "</div>";
	popup_area += "<p id=\"contactArea\">";
       popup_area += "<a href="+linkurl+" target=\"_blank\"><img src="+linkimg+" width=530 /></a>";
	popup_area += "</p></div><div id=\"backgroundPopup\" style=\"height: 809px; display: block; opacity: 0.8;></div>";
       
//if (readCookie('open_popup') == ""){        
//createCookie('open_popup', '1', 1);
document.write(popup_area);
//}