Anonymous User Data Tracking via Local Storage & Cookies

user_tracking_cookies.js

var storeName = "visited";
if (typeof(localStorage) == "undefined" ) {
    var cookieVal = readCookie(storeName);
    var value = ((cookieVal === null) ? window.location : cookieVal   
                     + window.location); 
    
    var days = 1;
    var date = new Date();
    date.setTime(date.getTime() + (days*24*60*60*1000));
    var expires = "; expires=" + date.toGMTString();
    document.cookie = storeName + "=" + value + "|" 
                                    + expires + "; path=/";
} else {
    //Use Local Storage
}

user_tracking_cookies_readcookie.js

function readCookie(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;
}

user_tracking_local_storage.js

var storeName = "visited";
if (typeof(localStorage) == 'undefined' ) {
    //Local Storage Not Available
} else {
    try {
        var sites = localStorage.getItem(storeName);
        sites = (sites === null) ? window.location : sites + window.location; 
        localStorage.setItem(storeName, sites + "|"); 
    } catch (e) {
        if (e == QUOTA_EXCEEDED_ERR) {
            //quota exceeded
        }
    }
}