Update demo.html : add warning for the Ajax demo (issue #1145), use module javascript instead of brower.window to access Date, RegExp and String objects
Update demo.html : add warning for the Ajax demo (issue #1145), use module javascript instead of brower.window to access Date, RegExp and String objects

brython-dev/brython,kikocorreoso/brython,kikocorreoso/brython,kikocorreoso/brython,brython-dev/brython,brython-dev/brython