Small JavaScript class to help create, read and delete cookie.

cookies.js

/**
 * Cookies - A small class to manipulate cookies from javascript
 *
 * Compressed version: https://gist.github.com/4147384 
 * 
 * @see 	www.quirksmode.org/js/cookies.html
 * @author	Anis uddin Ahmad <anisniit@gmail.com>  
 */

window.Cookies = {

    /**
     * Set/Overwrite a cookie value
     *
     * @param name
     * @param value
     * @param days      OPTIONAL Days till this cookie will stay valid. Default is current session
     * @param path      OPTIONAL domain root will be used by default
     */
    set: function(name, value, days, path) {
        if (days) {
            var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
            var expires = "; expires="+date.toGMTString();
        } else var expires = "";

        var dir = path || '/';
        document.cookie = name+"="+value+expires+"; path="+dir;
    },

    /**
     * Retrieve a cookie value
     *
     * @param name
     * @return String|null
     */
    get: function(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
    },

    /**
     * Remove a cookie
     *
     * @param name
     */
    delete: function(name) {
        this.set(name,"",-1);
    }
}