setCookie.js

function setCookie(name, value, options) {
            options = options || {};

            var expires = options.expires;

            if (typeof expires == "number" && expires) {
                var d = new Date();
                d.setTime(d.getTime() + expires * 1000);
                expires = options.expires = d;
            }
            if (expires && expires.toUTCString) {
                options.expires = expires.toUTCString();
            }

            value = encodeURIComponent(value);

            var updatedCookie = name + "=" + value;

            for (var propName in options) {
                updatedCookie += "; " + propName;
                var propValue = options[propName];
                if (propValue !== true) {
                    updatedCookie += "=" + propValue;
                }
            }
            document.cookie = updatedCookie;
        }