[DanInMa]

you doing things the hard way.

- here's some info on error handling as well - http://www.maheshchari.com/jquery-ajax-error-handling/

$(document).ready(function () {
var datastring= $("#form").serialize();
    $("#form").submit(function (event) {
        event.preventDefault();
        $.ajax({
            type: "post",
            dataType: "html",
            url: 'mail.php',
            data: datastring,
            success:function(html){
           $("#results").html(html);
}
        });
    });
});