gistfile1.js

    $('#saveChanges').click(function () {
        var rules = new Array();

        $('#assignedRules table.ruleTable tbody tr').each(function (i) {
            var subRuleCode = $('#subRuleCode', this).val();
            var productGroupId = $('#productGroupId', this).val();
            rules.push(new Rule(subRuleCode, productGroupId));
        });

        var postData = JSON.stringify(rules); ;

        $.ajax({
            url: '/rule/SaveUserRules',
            data: postData,
            contentType: 'application/json',
            dataType: 'json',
            type: 'post',
            success: onRulesSaved,
            error: function (data, textStatus) { alert(textStatus); }
        }
        );
    });