Added support for live re-auth and de-auth; fully AJAX, no page reload required, plus plugin-usable API.
(function(){tinymce.create('tinymce.plugins.AutoSavePlugin',{init:function(ed,url){var t=this;t.editor=ed;window.onbeforeunload=tinymce.plugins.AutoSavePlugin._beforeUnloadHandler;},getInfo:function(){return{longname:'Auto save',author:'Moxiecode Systems AB',authorurl:'http://tinymce.moxiecode.com',infourl:'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/autosave',version:tinymce.majorVersion+"."+tinymce.minorVersion};},'static':{_beforeUnloadHandler:function(){var msg;tinymce.each(tinyMCE.editors,function(ed){if(ed.getParam("fullscreen_is_enabled"))return;if(ed.isDirty()){msg=ed.getLang("autosave.unload_msg");return false;}});return msg;}}});tinymce.PluginManager.add('autosave',tinymce.plugins.AutoSavePlugin);})();