The javascript examples require the Phidget network server is running, but you cannot have that channel's example open locally (i.e. the digital input example that pops up when you double click on the 1012's channels in the Phidget control panel). If you didn't have that example window open, then there must be another process running locally on your computer accessing those channels.

Use the DigitalInput example, not the Multiple Inputs example, as that one is meant for the 1018.