I am far from being an expert on Javascript, but having examined the source of the page causing your problems, I noticed that there is a script tag defined with no source.
<SCRIPT language=JavaScript src="" type=text/javascript></SCRIPT>
This empty tag is exactly where the RTE_message_form_js.asp file should be included. Anything action to do with the RTE would reference the code in this file. Figure out what you did to the code that caused the include to be dropped, and your problem will be sorted.
Oh, and on a slightly different note, Axiadam, how about showing a little respect to the people trying to help you? The details they you provided regarding the problem are sketchy at best, and yet you find it acceptable to diss the one's who have to figure out what it is that you're on about.
To each their own ...