JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
    </head>
    <body>
        <H1>Testing iframe selector (Works in IE8, not IE7): a[style^='mso-comment-reference: MO_1</H1>
        <hr/><br/>
        
        <iframe id="submit_frame" src="http://freepages.genealogy.rootsweb.ancestry.com/~ohaver/1799CorneliusOhaver.mht">
        </iframe>
        <br/><hr/>
        
        <label><input type="checkbox" id="ToggleFade" checked> Toggle MO_1</label>
    </body>
</html>

CSS

.MsoNormal
{
    display:block !important;
}

.MsoCommentReference
{
    display:block !important;
}

JavaScript

$(document).ready(function ()
{
    $('#ToggleFade').change(function ()
    {
        alert('boo');
        $('#submit_frame').contents().find('a[style^='mso-comment-reference: MO_1']').parent($('p')).fadeToggle(0);
    }
});