How to Create & add custom HTML on Facebook fan pages
To create custom HTML elements to your facebook fan page or business page, first create a new fan page, and then click on the "boxes" tab. Now, right on the top of the page there's a grey bar, click on the button that says "fbml". Search for the application called "static fbml" and add it to your page. Go back to the homepage of your fan page, and click on "edit page" Find the fbml application and click edit. You'll now have a section where you can put html codes in to create custom web pages. Use a web designer program to help you make a webpage, and then simply just copy the codes into the box. Once that is done, you can move the custom html box to anywhere on the fan page you want.