function showBan (code,blank_flange,f,period) {
	var c = get_cookie('rkbgcount');
	var today = new Date();
	var ms = 2592000000;
	var expire = today.getTime() + ms * period;
	var nextDate = new Date(expire);

	if(c){
		var a = c.split('|');
		if(a[0]>=f){
			document.write(blank_flange);
		} else {
			a[0]++;
			a[1]++;
			var data = new Date(a[1]);
			set_cookie("rkbgcount",a[0]+"|"+a[1],data.toString().substring(0,data.toString().indexOf('+')),'/');
			document.write(code);
		}
	} else {
		set_cookie("rkbgcount","1|"+expire,nextDate.toString().substring(0,nextDate.toString().indexOf('+')),'/');
		document.write(code);
	}
}

function set_cookie (name, value, expires, path, domain, secure) {
	document.cookie = name + "=" + escape(value) +
	((expires) ? "; expires=" + expires : "") +
	//((path) ? "; path=" + path : "") +
	"; path=/" +
	((domain) ? "; domain=" + domain : "") +
	((secure) ? "; secure" : "");
}

function get_cookie(name) {
	var cookie = " " + document.cookie;
	var search = " " + name + "=";
	var setStr = null;
	var offset = 0;
	var end = 0;
	if (cookie.length > 0) {
		offset = cookie.indexOf(search);
		if (offset != -1) {
			offset += search.length;
			end = cookie.indexOf(";", offset)
			if (end == -1) {
				end = cookie.length;
			}
			setStr = unescape(cookie.substring(offset, end));
		}
	}
	return(setStr);
}