How to login in to http website and check the pages

[tmcdonald]

This is one of those problems that only gets worse as web sites get more complex. Simply put, check_http and curl aren't going to cut it. Chances are there is some Javascript being executed that builds the page or submits the form, and for that you need a true synthetic transaction engine as @eloyd and @mcapra said. I personally am a fan of TestCafe, but Selenium or CasperJS should work as well.