function setCookie(name, value, expiredays, path, domain, secure) {
    if (expiredays) {
       var exdate=new Date();
       exdate.setDate(exdate.getDate()+expiredays);
       var expires = exdate.toGMTString();
    }
    document.cookie = name + "=" + escape(value) +
    ((expiredays) ? "; 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 deleteCookie(nameCo)  
{
var exp3 = new Date();
exp3.setTime (exp3.getTime() - 1000000000);
var cval = getCookie(nameCo);
document.cookie = nameCo + "=" + cval + "; expires=" + exp.toGMTString();
}