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How To Reset Cascading Dropdown Controls Using JavaScript And jQuery

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Hi,

Recently, I have encountered an issue on how to reset cascading dropdown controls in cross browsing mode (IE/Firefox/Chrome) using JavaScript and jQuery. After creating code spikes, I come up with a solution that works across major browsers.
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$(".reset-link").click(function() {
    ResetCascade($(this));
});

function ResetCascade(itemReset) {
    var formID = $(itemReset).closest('.contact-form');
    if (formID != null) {
        var firstDropDown = $(formID).find('.cascading_group').find('.firstDropDownDiv select');
        var secondDropDown = $(formID).find('.cascading_group').find('.secondDropDownDiv select');
        var thirdDropDown = $(formID).find('.cascading_group').find('.thirdDropDownDiv select');
        if (firstDropDown != null) {
            var valueId = $(firstDropDown).val();
            if (valueId != "" && valueId != null) {
                $(".firstDropDownDiv select option:selected").attr('selected', false);
                $(".firstDropDownDiv select option:first").attr('selected', 'selected');
            }
            if (secondDropDown != null) {
                var valueId2 = $(secondDropDown).val();
                if (valueId2 != "" && valueId2 != null) {
                    $(".secondDropDownDiv select option:selected").attr('selected', false);
                    $(".secondDropDownDiv select option:first").attr('selected', 'selected');
                }
            }
            if (thirdDropDown != null) {
                var valueId3 = $(thirdDropDown).val();
                if (valueId3 != "" && valueId3 != null) {
                    $(".thirdDropDownDiv select option:selected").attr('selected', false);
                    $(".thirdDropDownDiv select option:first").attr('selected', 'selected');
                }
            }
        }
    }
}

Cheers! :)

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