// The constructor function: creates a cookie object for the specfied document, with a specified name and optional attributes.
// Arguments
// document: The document object that the cookie is stored for. Required
// name: Specifies a name for the cookie. Required
// hours: An optional number of hours the specifies the number of hours
//        from now that the cookie should expire.
// path:  An optional

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;
}

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
}

function _Cookie_load(){
	var allCookies = this.$document.cookie;
	if(allCookies == "") return false;
	var start = document.cookie.indexOf(this.$name +'=');
	if (start == -1) return false;
	start += this.$name.length + 1;
	var end = allCookies.indexOf(';', start);
	if(end == -1) end = allCookies.length;
	var cookieVal = allCookies.substring(start,end);

	var a = cookieVal.split('&');
	for (var i=0; i<a.length; i++) 
		a[i] = a[i].split(':');

	for (var i=0; i<a.length; i++){
		 this[a[i][0]] = unescape(a[i][1]);
	}
	return true;
}


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;
}

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