Navigation links don't work on my first web pages.
I'm new to web design. Technical knowledge is bare minimum. I recently purchased the Sitepoint web design book 'Build Your Own Website the Right Way Using HTML & CSS' by Ian Lloyd. I began designing the sample Diving Club site given in the book. By the end of the Second Chapter, three web pages are made (index.html, about.html, contact.html). I linked between these pages by the simple navigation menu:
But when I click on the links of one page, the other pages don't open. Operating system I'm using is Windows 7 Home Premium; Browser Internet Explorer 9. What should I do? I'm a novice. Please help. Thanks in advance.