// The constructor function. Creates a cookie object for the specified
// document, with a specified name. attributes. 
// Arguments:
// document: the Document object that the cookie is stored for. Required.
// name: a string that specifies a name for the cookie. Required.
// hours: an optional number that specifies the number of hours from now that the cookie should expire.
// path: an optional string that specifies the cookie path attribute.
// domain: an optional string that specifies the cookie domain attribute.
// secure: an optional boolean value that, if true, requests a secure cookie.
//
function Cookie(document, name, hours, path, domain, secure)    {
    this.$document = document;
    this.$name = name;
    if (hours) this.$expiration = new Date((new Date()).getTime() + hours*3600000); else this.$expiration = null;
    if (path) this.$path = path; else this.$path = null;
    if (domain) this.$domain = domain; else this.$domain = null;
    if (secure) this.$secure = true; else this.$secure = false;
}
// This function is the store() method of the Cookie object
function _Cookie_store()    {
    var cookieval = "";
        for(var prop in this) {
        if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function')) 
        continue;
        if (cookieval != "") cookieval += '&';
        cookieval += prop + ':' + escape(this[prop]);
    }
    var cookie = this.$name + '=' + cookieval;
    if (this.$expiration)
    cookie += '; expires=' + this.$expiration.toGMTString();
    if (this.$path) cookie += '; path=' + this.$path;
    if (this.$domain) cookie += '; domain=' + this.$domain;
    if (this.$secure) cookie += '; secure';
    this.$document.cookie = cookie;
}

// This function is the load() method of  the Cookie object
function _Cookie_load()   {
    var allcookies = this.$document.cookie;
    if (allcookies == "") return false;
    var start = allcookies.indexOf(this.$name + '=');
    if (start == -1) return false; // cookie not defined for this page.
    start += this.$name.length + 1; // skip name and equals sign.
    var end = allcookies.indexOf(';', start);
    if (end == -1) end = allcookies.length;
    var cookieval = allcookies.substring(start, end);
    var a = cookieval.split('&'); // break it into array of name/value pairs
    for(var i=0; i < a.length; i++) // break each pair into an array
    a[i] = a[i].split(':');
    for(var i = 0; i < a.length; i++) {
        this[a[i][0]] = unescape(a[i][1]);
    }
    return true;
}

// This function is the remove() method of the Cookie object.
function _Cookie_remove()  {
    var cookie;
    cookie = this.$name + '=';
    if (this.$path) cookie += '; path=' + this.$path;
    if (this.$domain) cookie += '; domain=' + this.$domain;
    cookie += '; expires=Fri, 02-Jan-1970 00:00:00 GMT';
    this.$document.cookie = cookie;
}

// Create a dummy Cookie object, so we c
//     an use the prototype object to make
// the functions above into methods.

new Cookie();
Cookie.prototype.store = _Cookie_store;
Cookie.prototype.load = _Cookie_load;
Cookie.prototype.remove = _Cookie_remove;