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./othercms/dotclear-2.22/plugins/dcCKEditor/js/ckeditor/plugins/preview/preview.html
<script>

// Prevent from DOM clobbering.
if ( typeof window.opener._cke_htmlToLoad == 'string' ) {
var doc = document;
doc.open();
doc.write( window.opener._cke_htmlToLoad );
doc.close();

delete window.opener._cke_htmlToLoad;
}

</script>