$(document).ready(function() {
    $("#send").click(function() {
        $.ajax({
            type: 'POST',
            url: '/sendform.aspx',
            data: 'name={0}&email={1}&message={2}'.format($("#name").value, $("#email").value, $("#message").value),
            success: function() {
                $(".form").fadeOut('fast',
                    function() {
                        $("#thanx").fadeIn('fast');
                    });
                
            },
            dataType: 'html'
        });
    });
});

String.prototype.format = function() { var s = this, i = arguments.length; while (i--) { s = s.replace(new RegExp('\\{' + i + '\\}', 'gm'), arguments[i]); } return s; };