How to change script to ignore h3 tags?

Question

JavaScript

How to change the script so that it takes into account only li and div equal to it in order?
Live example: jsfiddle.net/4adf4eny Removing h3 will work fine, but they are needed.

(function(s) {
    var n;
    s(".tabs").on("click", "li:not(.active)", function() {
        n = s(this).parents(".tabs_block"), s(this).dmtabs(n)
    }), s.fn.dmtabs = function(n) {
        s(this).addClass("active").siblings().removeClass("active"), n.find(".box").eq(s(this).index()).show(1, function() {
            s(this).addClass("open_tab")
        }).siblings(".box").hide(1, function() {
            s(this).removeClass("open_tab")
        })
    }
})(jQuery);

<table class="content tabs_block">
    <tbody><tr>
        <td class="va-top">
            <ul class="tabs">
                <li class="active">верх Общая информация</li>
                <h3>3Д Фрезерование:</h3>
                <li>крупа 3д</li>
                <li>3д woods</li>
                <h3>3Д Фрезерование:</h3>
                <li>2д мир</li>
                <h3>3Д Фрезерование:</h3>
                <li>низ железо</li>
            </ul>
        </td>
        <td class="va-top">
            <div class="box visible">1</div>
            <div class="box">2</div>
            <div class="box">3</div>
            <div class="box">4</div>
            <div class="box">5</div>
        </td>

    </tr></tbody>
</table>

Answer 1

(function(s) {
    var n;
    s(".tabs li").on("click", "li:not(.active)", function() {
        n = s(this).parents(".tabs_block"), s(this).dmtabs(n)
    }),
    s.fn.dmtabs = function(n) {
        s(this).addClass("active").siblings().removeClass("active"), n.find(".box").eq(s(this).index()).show(1, function() {
            s(this).addClass("open_tab")
        }).siblings(".box").hide(1, function() {
            s(this).removeClass("open_tab")
        })
    }
})(jQuery);

Like so...