The following javascript widget is a completely valid javascript widget. You can copy and paste it into a regular html doc and it will render successfully. However, if you copy/paste it into the HTML view in cuteeditor and then switch back to NORMAL view, it will not display:
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<p align="center">
<script type="text/javascript" src="http://cdn.widgetserver.com/syndication/subscriber/InsertWidget.js"></script>
<script>if (WIDGETBOX) WIDGETBOX.renderWidget('240bde05-83a5-4661-8966-0df980a8122d');</script>
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<script type="text/javascript" src="http://cdn.widgetserver.com/syndication/subscriber/InsertWidget.js"></script>
<script>if (WIDGETBOX) WIDGETBOX.renderWidget('dfc8e42e-a2a4-4140-9b76-8c8e58d9883b');</script>
<noscript>Get the <a href="http://www.widgetbox.com/widget/how-to-relax-deep-relaxation-stress-relief">"How To Relax? Deep Relaxation Stress Relief</a> widget and many other <a href="http://www.widgetbox.com/">great free widgets</a> at <a href="http://www.widgetbox.com">Widgetbox</a>!</noscript></p>