function getRequest(){
	if(location.search.length > 1) {
		var get = new Object();
		var ret = location.search.substr(1).split("&");
		for(var i = 0; i < ret.length; i++) {
			var r = ret[i].split("=");
			get[r[0]] = r[1];
		}
		return get;
	} else {
		return false;
	}
}


function writeCookie(){
	comming_time = new Date( );
	comming_time.setDate(comming_time.getDate( ) + 30); // 「30日後」に設定する場合
	time_limit = "expires=" + comming_time.toGMTString( ) + ";";
	document.cookie = "TrafficGate_ad=TG_ad_entered;" + time_limit;
	return ;
}


function main(){
	var get = getRequest();
	if (get['TG']!=null){
		writeCookie();
	}
	return ;
}