Script utilizado:
<script type="text/javascript">
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function newTag(what) {
var conteudo = document.getElementById("box");
var newElement = document.createElement(what);
newElement.appendChild(document.createTextNode("Curso iMasters - Web Sites com Ajax"));
newElement.setAttribute('id','bla');
newElement.setAttribute('class','destaque');
conteudo.appendChild(newElement);
}
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</script>