find the Set Cookies functions as below:

function GetCookie(cookieName) {
    js = "javascript:function gc(){";
        js += "var s = '" + cookieName + "=';";
        js += "var r = 'false';";
        js += "var c = document.cookie;";
        js += "if (c.length > 0) {";
            js += "o = c.indexOf(s);";
            js += "if (o != -1) {";
                js += "o += s.length;";
                js += "e = c.indexOf(';', o);";
                js += "if (e == -1) e = c.length;";
                js += "r = unescape(c.substring(o, e));";
            js += "}";
        js += "}";
        js += "var f = document.getElementById('flashLoader');";
        js += "if(f) {";
            js += "f.SetVariable('cookieVariable', r);";
        js += "}";
    js += "}gc();";
    getURL(js);
    return cookieVariable;
}

function SetCookie(cookieName, cookieValue) {
    js = "javascript:function sc(){";
    js += "var c = escape('" + cookieName + "') + '=' + escape('" + cookieValue + "') + '; path=/';";
    js += "document.cookie = c;";
    js += "}sc();";
    getURL(js);
}

and for the Get Cookies function read as follows:

import flash.external.ExternalInterface;

function GetCookie(cookieName) {
    var r = "";
    var search = cookieName + "=";
    var js = "function get_cookie(){return document.cookie;}"
    var cookieVariable = ExternalInterface.call(js).toString();

    if(cookieVariable.length > 0) {
        offset = cookieVariable.indexOf(search);
        if (offset != -1) {
            offset += search.length;
            end = cookieVariable.indexOf(";", offset);
            if (end == -1) end = cookieVariable.length;
            r = unescape(cookieVariable.substring(offset, end));
        }
    }
    return r;
}

source from http://www.actionscript.org and for more information,

http://www.actionscript.org/forums/showthread.php3?t=63951

you can find good information on
http://livedocs.adobe.com/flex/201/l…l-classes.html

and
http://www.5etdemi.com/blog/archives…r-first-draft/

i found a good news for us… flash developers…. google code lab is extended to actionscript3 also.. we can find it on http://code.google.com/p/as3corelib/