function setCookie(name, value, expires, path, domain, secure){
var curCookie = name + "=" + escape(value) +
((expires) ? "; expires=" + expires.toGMTString() : "") 
+((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") 
+((secure) ? "; secure" : "");
document.cookie = curCookie;
}
function top_ban(){
ban = document.getElementById("topban");
btn = document.getElementById("topbtn");
if(ban.style.display == "none"){
ban.style.display="block";
btn.src="for_html/top_btn_close.gif";
btn.title="Закрыть баннер";
VisBan = ban.style.display;
setCookie("vBan", VisBan);
}else{ 
ban.style.display="none"
btn.src="for_html/top_btn_open.gif";
btn.title="Открыть баннер";
VisBan = ban.style.display;
setCookie("vBan", VisBan);
}
}