other window functions
- alert(), input = confirm(),
- x = prompt(text, default)
- back() which also moves back in frames while history.back() doesn't
- setInterval() and clearInterval(), more efficient than periodic timeouts
- disableExternalCapture() & enableExternalCapture()
what is this good for? to disallow foreign wrapper frames
from reading our keypresses, maybe?
- find(string, respectcase, backwards)
above produces an error. also does home(), while print() works. wack.