Keymaster setup

script.js

/**
** Keymaster understands the following modifiers: ⇧, shift, option, ⌥, alt, ctrl, control, command, and ⌘.
** The following special keys can be used for shortcuts: backspace, tab, clear, enter, return, esc, escape, space,
** up, down, left, right, home, end, pageup, pagedown, del, delete and f1 through f19.
**
*/

key('a', function(){ alert('you pressed a!') });