[xwiki-devs] the wysiwyg js api to use in client

Hello ,I wander if there is the js api document about the wysiwyg which I can use in client .I need to add a very very simple function to the wysiwyg in client. but I only find some api I can use here!(I use xwiki 3.5) http://extensions.xwiki.org/xwiki/bin/view/Extension/WYSIWYG+Editor+Module#… Is there api in detail ?.In fact ,The most important thing is to add some HTML elements (just as div or button)to the xwiki document .It is very easy no matter in javascript or gwt(It is unable to use here because of some problems, so I have to implement it in client with js). But I don't know how to operate the xwiki document w't ith js,I even can't get it ,so .. A poor student with poor English and programming knowledge who have to develop the system by himself need your help .Thanks ! Why can't we offer the download of apis ? of it's just I havn't fount theml