Update timer.js

fixed merge issues
make OO
Merge pull request #22 from monicaedavidson/monicasbranch

custom formatted drop down menu
Merge pull request #23 from monicaedavidson/lilybranch

make OO
Changes div IDs to classes
Merge pull request #24 from monicaedavidson/button

Changes div IDs to classes
debugs and notes