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

function getCookie(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);
}


function menu_vis(menuid) {

  if (document.getElementById(menuid).style.display=='none') {
      document.getElementById(menuid).style.display='';
      setCookie(menuid, 'block', 'Mon, 01-Dec-2010 00:00:00 GMT', '/');
  }
  else {
      document.getElementById(menuid).style.display='none';
      setCookie(menuid, 'none', 'Mon, 01-Dec-2010 00:00:00 GMT', '/');
  }

}

function chclass(classname) {

    var name;
    if(classname=='b_up'){ name='b_down';} else { name='b_up';}
    return name;

}