MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */
if (mwCustomEditButtons) {
 
   mwCustomEditButtons[mwCustomEditButtons.length] = {
     "imageFile": "images/2/23/Button_code.png",
     "speedTip": "inline <code> tag",
     "tagOpen": "<code>",
     "tagClose": "</code>",
     "sampleText": "Insert code here"};

  mwCustomEditButtons[mwCustomEditButtons.length] = {
     "imageFile": "images/3/3c/Button_pre.png",
     "speedTip": "block <pre> tag",
     "tagOpen": "<pre>\n",
     "tagClose": "\n</pre>",
     "sampleText": "Insert code here"};

  mwCustomEditButtons[mwCustomEditButtons.length] = {
     "imageFile": "images/d/d2/Button_source.png",
     "speedTip": "block <source> tag",
     "tagOpen": "<source lang=\"ruby\">\n",
     "tagClose": "\n</source>",
     "sampleText": "Insert code here"}
}