Online shopping during work hours could jeopardize your job, although thousands are expected to do it this holiday season.

Making purchases while punched in on the time clock could lead to longer unemployment lines.

CareerBuilder.com reports 20-percent of bosses have fired someone for non-work online activity. Five percent of employers say they have given workers their walking papers while doing online shopping during business hours.

Even so, many employees apparently still like living on the edge. A new survey finds the number of workers planning to shop online on the job has risen from 29-percent in 2008 to 32-percent this year.

The CareerBuilder.com survey also reveals over half of workers say they use the Internet for activities not related to work.

When it comes to social networking, three out of five full-time workers say they have that type of Internet page, with eleven percent spending an hour or more on their networking website.

That activity does not go unnoticed by the powers that be. Sixteen percent of employers say they monitor social networking profiles of employees and 14-percent said they monitor blogs.

And that's not all they're watching. Thirty-two percent say they monitor e-mails and 16-percent look closely at instant messaging.