//ÉèÖÃcookie
function setCookie(cname,value){
	var exp = new Date();
	exp.setTime(exp.getTime() + 0*60*60*1000);
	document.cookie=cname+"="+value+";expires="+exp.toGMTString();
}
//»ñÈ¡cookie
function getCookie(name){
var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
if(arr=document.cookie.match(reg)) return unescape(arr[2]);
else return null;
}

var ck = getCookie('ad');
if(ck==null){
	document.writeln("<script language=\"javascript\" src=\"\/ads\/tan.js\"><\/script>");
	setCookie('ad',1);
}