There is a reason to assume that it is not there, particularly if you're developing a U.S. government website, and that's for accessibility reasons. Google Sec

There is a reason to assume that it is not there, particularly if you're developing a U.S. government website, and that's for accessibility reasons. Google Section 508 and you'll see what I mean. Go ahead and build your site to use javascript, but don't continue under the false pretense that everyone needs/can use javascript.