Youtube in forum

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txt=txt.replace(/\<div class=\"wcode\">/ig,'<div class="hwcode">CODE</div><div class="wcode">');
txt=txt.replace(/\[YOUTUBE](.+?)\[\/YOUTUBE]/ig,'<div name="video"><iframe width="100%" src="https://youtube.com/embed/$1" class="if_youtube" frameborder="0" allowfullscreen="true"></iframe></div>');

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<div class="wcode">');
txt=txt.replace(/\[YOUTUBE](.+?)\[\/YOUTUBE]/ig,'<div name="video"><iframe width="100%" src="https://youtube.com/embed/$1" class="if_youtube" frameborder="0" allowfullscreen="true"></iframe></div>');

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    var Width = document.getElementById('yut_block').offsetWidth;
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    {
        Width = document.getElementById('yut_block').parentNode.parentNode.offsetWidth;
        Width = Width - 20;
    }
    Width = Width - 210;
    if (Width > 630)
        Width = 630;
    Height = Width / 16 * 9;
    document.write('<iframe width="' + Width + '" height="' + Height + '" src="https://www.youtube.com/embed/JOU622zS628" frameborder="0" allowfullscreen></iframe>');
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