html.htm

<div class="tab-content" id="ribbonTabNew" style="display: none;">
    <!-- Clipboard group -->
    <div class="ribbon-group" id="ribbonGroupClipboard">
        <div class="ribbon-group-content">

            <div id="newTabButtonContainer"
                 style="display: inline-block; float: left; margin-right: 5px">
               
                <div onclick="alert('Clicked! JavaScript is part of loaded Html in this case.');"
                     class="ribbon-button ribbon-button-big"
                     id="btnNewButton">

                    <div class="ribbon-button-big-image-container">
                        <img src="/RibbonExtensions/Images/icon_large_test.png"
                             class="ribbon-button-big-image">
                    </div>
                    <div class="ribbon-button-big-label-container">
                        <p class="ribbon-button-label">New<br>Button</p>
                    </div>
                </div>

            </div>

        </div>
    </div>
</div>