Dynamic Ajax content


How can i load the Tiny MCE WYSIWYG script into a page loaded by dynamic ajax content ?
I tried oadobjs('jscript/tiny_mce/tiny_mce.js'); after ajaxpage() fonction but the problem seems to be with the tinyMCE.init() fonction because i can't load this part as a .js object, cause i choose the "theme" as this
PHP Code:
if ($type_tiny==2)
"theme : 'default', mode : 'textareas' });";
if (
"theme : 'simple', mode : 'textareas' });";
That's why the editor can't be loaded on the textareas of the new page ...

Any solution ?