how to set content of a speicific node inside tinymce?

I want to set content of an element to the first node of the tiny mce. I can retrieve the id of this node, but don't know how to set content inside it.

Help Appreciated. Thanks in adva开发者_开发百科nce.

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You can do that using something like the following. Make sure to enter valid html.

tinyMCE.activeEditor.getBody().firstChild.innerHTML='<span class="customStyle">Testtext</span>';