You should have them in the download file from github.
You can use the googleapi resource as an alternative
Also dont forget to include all the other js files required, view the source of the demo for them if you dont have them.
could someone tell me why this may not be working on IE8…I can get it to work on some machines with IE8 but not others? Also how in a php form could I read in the signature similar to this:
Where the user receives the inputted fields along with the signature written?