Mousetrap
Simple library for handling keyboard shortcuts in Javascript
...If you want to bind multiple key commands to the same callback you can pass in an array for the first argument. Mousetrap 1.4 introduced a generic mod helper which lets you set cross platform shortcuts. The sequence of keys feature was inspired by Gmail. Any keys separated by a space will be considered a sequence. If you type each key in order the final one in the sequence will trigger the callback. If you type a key not in the sequence or wait too long the sequence will reset. You can also make a sequence that includes key combinations within it.