 If the user opens a SystemBrowser, all the JavaScript source files are listed in the file pane of the browser.If the user clicks on one of these files, it will be read, parsed (by an OMeta JavaScript parser) and displayed similar to a Smalltalk browser with functions or class definitions listed and, for each class, all the method names are shown.The user can click on a method name, edit its code in the bottom pane, and then save the new definition.