How set value for TinyMCE?

How can one set the value for TinyMCE or reset its current value?

The form name is fo开发者_如何学编程rm and element which associated with TinyMCE is editor.

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tinyMCE.activeEditor.setContent(....)

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Specifically for any textarea, just specify id of textarea.

For example, id of textarea is country then

tinyMCE.get('country').setContent('AnyCountryName');