修改配置文件fckconfig.js中的

FCKConfig.EnterMode = 'br' ;     // p | div | br （回车）
FCKConfig.ShiftEnterMode = 'br' ; // p | div | br（shift+enter)

改变工具栏排列顺序：

FCKConfig.ToolbarSets["Default"] = [
     ['Source','DocProps','-','Preview','Form','Checkbox','Radio','TextField','Textarea','Select','Button','ImageButton','HiddenField'],
     ['JustifyLeft','JustifyCenter','JustifyRight','JustifyFull','Style','FontFormat','FontName','FontSize'],
     ['TextColor','BGColor','Bold','Italic','-','OrderedList','UnorderedList','-','Link','Unlink']
] ;