Google Inc. has introduced a new feature in its Gmail that will prevent a drunk person from sending stupid or bad e-mails late at night.

The optional feature called "Mail Goggles" activates when Gmail users compose e-mail at the program's default launching time of between 10 p.m. of Friday to 4 a.m. on Saturday. Arithmetical quizzes will appear on the screen that should be answered in seconds by the user. Failure to answer the quizzes will cause the e-mail to be put on hold.

The new function needs to be set when it should launch and the degree of difficulty of the math questions to be answered. It can be turned on through the "Settings" link of Gmail, under the "Labs" tab.

Gmail engineer Jon Perlow designed the comical add-on to help people avoid regrets or bad repercussions of e-mails they send when their mind is not sober.