/*
// @name      Cookie Management
// @namespace http://www.netspade.com/articles/2005/11/16/javascript-cookies/
// @version   
// @revision  2005.11.16
// @author    Jason Davies, http://www.netspade.com
// @license   
// @download  2006.03.08
*/

/*
// Sets a Cookie with the given name and value.
// name       Name of the cookie
// value      Value of the cookie
// [expires]  Expiration date of the cookie (default: end of current session)
// [path]     Path where the cookie is valid (default: path of calling document)
// [domain]   Domain where the cookie is valid (default: domain of calling document)
// [secure]   Boolean value indicating if the cookie transmission requires a secure transmission
*/
function setCookie(name, value, expires, path, domain, secure) {
    document.cookie= name + "=" + escape(value) +
        ((expires) ? "; expires=" + expires.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

/*
// Gets the value of the specified cookie.
// name       Name of the desired cookie. Returns a string containing value of specified cookie, or null if cookie does not exist.
*/
function getCookie(name) {
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    } else {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1) {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

/*
// Deletes the specified cookie.
// name       Name of the cookie
// [path]     Path of the cookie (must be same as path used to create cookie)
// [domain]   Domain of the cookie (must be same as domain used to create cookie)
*/
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";
    }
}