digitalBush/jquery.maskedinput — pull request #84 by mohnish (2012-05-09 21:32:19+00:00)
Title: This allows to user to choose whether to clear the input field on focus or not.

The plugin's default behavior on a focus/blur event is to clear the input even if it has a previously entered invalid value. This commit adds the ability to add an option to the mask, which allows users to retain the previously entered value on focus/blur.