WYSIWYG editor for CMS systems

Im currently designing a CMS for my Website in PHP and I have come across a bit of a problem. I wish to have a WYSIWYG editor on the post screen integrated with the PHP page but I havent the first idea how to go about doing this. Ideally, Id like this to not be Java based, but something along the lines of Javascript/XML/etc.

Now, I have a few requirements. Firstly, I plan to keep it simple. I can cope with editing the script but Id need something I can actually edit. Secondly, it has to be cross-browser compliant, supporting IE, Firefox and Netscape at a minimum. Thirdly, I want it to easily integrate into my exisiting script, allowing the content to be easily passed into the database.

Id rather it was all loaded in realtime, although a similar style to a forum using BB code would do the trick.

Anyone have any ideas for a premade script or a tutorial I should be looking at?

It's been a while since I checked it out and honestly I can't remember if it was a java applet or not, but fckeditor (??) is free and may work for you.

What's the deal with integrating fckeditor and other (l)GPL WYSIWYG systems into existing CMS systems? Doesn't the fact that they are GPL'd mean the developer has to also release the CMS system under GPL? Fckeditor is a fine choice.

I tried using FCKeditor after having it recommended to me but for some reason none of the sample scripts or the script I implemented it into load. All I recieve is a blank area where the script should be. Any ideas what Im doing wrong, or could this be my server causing the problems?

Its a fairly basic server Im using it on (its my script test server) so it could be config options on that.

Yeah I also recall struggling with it a number of times until I got it to work. If memory serves, I was patching up an earlier coder's CMS setup and he'd used FCK for his setup. Just make sure that every single file is exactly where they're supposed to be, FCK isn't exactly an "all in one file" setup.

I used tinyMCE http://tinymce.moxiecode.com/ I dunno if its something for you but it worked for me.

Does it include an auto <br> option?

nope you dont have to release the hole CMS as GPL , deal with it as a componnent ....
if the user want to get it , they can go to the main site or FCKeditor and get it or get the source of it ...
but if you made any changes to the fckeditor you have to make it avaliable as GPL , which mean that the modification for FCKeditor that you include in your CMS has to be GPL .
i hope that i give you the idea ..