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

function writeCookie(name, value, hours, path)
{
var expire = "";
if(hours != null){
expire = new Date((new Date()).getTime() + hours * 864000);
expire = "; expires=" + expire.toGMTString();
}
document.cookie = name + "=" + value + expire + "; path = " + path;
}

function checkCookie(){
// check if the cookie is set
if ( readCookie("refLogotion") == "" ){
//no cookies;
writeCookie("refLogotion",document.referrer, 864000, "");            
}
}
checkCookie();