evercookie 使用方法示例

<script type="text/javascript" src="jquery-1.4.2.min.js"></script><script type="text/javascript" src="swfobject-2.2.min.js"></script><script type="text/javascript" src="evercookie.js"></script><script>    var ec = new evercookie();    // set a cookie "id" to "12345"    // usage: ec.set(key, value)    ec.set("id", "12345");    // retrieve a cookie called "id" (simply)    ec.get("id", function(value) { alert("Cookie value is " + value) });    // or use a more advanced callback function for getting our cookie    // the cookie value is the first param    // an object containing the different storage methods    // and returned cookie values is the second parameter    function getCookie(best_candidate, all_candidates)    {        alert("The retrieved cookie is: " + best_candidate + "\n" +            "You can see what each storage mechanism returned " +            "by looping through the all_candidates object.");        for (var item in all_candidates)            document.write("Storage mechanism " + item +                " returned: " + all_candidates[item] + "<br>");    }    ec.get("id", getCookie);    // we look for "candidates" based off the number of "cookies" that    // come back matching since it's possible for mismatching cookies.    // the best candidate is most likely the correct one</script>