At 01h49'37" I believe that it should be n+3 instead of n+4, that is $("li.fields").filter(":nth-child(n+3)").addClass("hide") instead of $("li.fields").filter(":nth-child(n+4)").addClass("hide"). The validateForm() function at the end didn't work for me, because of this error: "An invalid form control with name='' is not focusable." However, thank you so much for your tutorial. It's still a great help after 2 years since it was uploaded, even though some of the things have now become outdated!
It was already uploaded in your tube channel..why again eduonix ?? Please make some more projects using html5, Css3 and JS...your tutorial are really helpful..