I'm want to write some JS in a custom button to update the status field of the current object. I found some example code that seems to do what I want, but I'm getting an error when performing the update.

http://pastebin.com/MQdFdFde

The error I'm getting is: Refused to set unsafe header "User-Agent"

I get this error when I try to update SF with result = sforce.connection.update(updateRecords);

Any tips?