At the left hand side of the screen is a frame for navigation. From here you can select a pinyin (the default) or Chinese character view of the text, or you can click on a hexagram's number to view it.
When you select a hexagram, the Chinese text of the hexagram is loaded into the left-hand frame and the list of words used by it is loaded into the right-hand frame. Clicking on a word or character in the left-hand frame will make the right-hand frame scroll to the definition of that character.
In order to view Chinese characters, you must have BIG5 character support enabled in your browser. My package of choice under Windows is NJStar.
Click here to see a brief guide to pronouncing the pinyin words. It's a bit basic, but it's better than nothing, hopefully.