disply the problem of pushing content
positioned the sub menu for pure css navigation
added explanation about permutation
added question for lottery and testing
style changes on the website page
added link to home page
added new file oop
class
added calss example
some more content to be added
one queston
Update dom.html

Fix misleading statement - async scripts are the right thing to do, while script injected async scripts are wrong nowadays
Merge pull request #48 from FilipZawada/master

Update dom.html
slides to talk about front end interview process
chucnk of stuff added
Merge pull request #49 from khan4019/master

merge