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

function getCookie(name)
{
        var prefix = name+"=";
        var start  = document.cookie.indexOf(prefix);
        if (-1==start)
                return '';
        var end = document.cookie.indexOf(";", start+prefix.length);
        if (-1==end)
                end = document.cookie.length;
        var value = document.cookie.substring(start+prefix.length, end);
        return unescape(value);
}

function delCookie(name, path, domain)
 {
  if (getCookie(name))
  {
  document.cookie = name + "=" + 
  ((path) ? "; path=" + path : "") +
  ((domain) ? "; domain=" + domain : "") +
  "; expires=Thu, 01-Jan-70 00:00:01 GMT"
  }
 }