//get cookies
    function f_getCookie(name)//      
    {
        var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
        var value = null;
        if (arr != null) 
        {
            value = unescape(arr[2]);
        }
        if (value == "undefined") 
        {
            value = null; 
        }
        return value;
    }
    //Create cookies
    function f_SetCookies(name,value,expireDays)
    {
        var Days = expireDays; //save cookies day
        var exp  = new Date();    
        exp.setTime(exp.getTime() + Days*24*60*60*1000);
        document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
    }
    //Delete cookies
    function f_delCookie(name)
    {
        var exp = new Date();
        exp.setTime(exp.getTime() - 1);
        var cval=f_getCookie(name);
        if(cval!=null) 
            document.cookie= name + "="+cval+";expires="+exp.toGMTString();
    }