Whenever, I take online Quiz from the following site the "Next" button which helps to navigate next question is always disabled. However, whenever I open the same page in "Chrome" browser it works. I have attached a figure stating the same and the link for the website is given below: http://www.thehindu.com/sci-tech/science/the-hindu-science-quiz-of-thunderheads-and-pinnipeds/article24151626.ece?homepage=true