/* cookies.js */
/*
     Example File From "JavaScript and DHTML Cookbook"
     Published by O'Reilly & Associates
     Copyright 2003 Danny Goodman
*/
// utility function to retrieve a future expiration date in proper format;
// pass three integer parameters for the number of days, hours,
// and minutes from now you want the cookie to expire; all three
// parameters required, so use zeros where appropriate
function getExpDate(days, hours, minutes) {
	var expDate = new Date();
	if (typeof days == "number" && typeof hours == "number" && typeof hours == "number") {
			expDate.setDate(expDate.getDate() + parseInt(days));
			expDate.setHours(expDate.getHours() + parseInt(hours));
			expDate.setMinutes(expDate.getMinutes() + parseInt(minutes));
			return expDate.toGMTString();
	}
}
// utility function called by getCookie()
function getCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1) {
			endstr = document.cookie.length;
	}
	return unescape(document.cookie.substring(offset, endstr));
}
// primary function to retrieve cookie by name
function getCookie(name) {
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
			var j = i + alen;
			if (document.cookie.substring(i, j) == arg) {
					return getCookieVal(j);
			}
			i = document.cookie.indexOf(" ", i) + 1;
			if (i == 0) break; 
	}
	return null;
}
// store cookie value with optional details as needed
function setCookie(name, value, expires, path, domain, secure) {
	document.cookie = name + "=" + escape (value) +
			((expires) ? "; expires=" + expires : "") +
			((path) ? "; path=" + path : "") +
			((domain) ? "; domain=" + domain : "") +
			((secure) ? "; secure" : "");
}
// remove the cookie by setting ancient expiration date
function deleteCookie(name,path,domain) {
	if (getCookie(name)) {
			document.cookie = name + "=" +
					((path) ? "; path=" + path : "") +
					((domain) ? "; domain=" + domain : "") +
					"; expires=Thu, 01-Jan-70 00:00:01 GMT";
	}
}