https://webprog3.com,sametab
Click on the "Main Screen" link first for brief explanations of what the various buttons, boxes and links of webProg3's interface achieve. Use this in conjunction with the "Mini-Help" (see the link on the far left). This should be more than enough to get you started.
The other articles in this Full Help supply the details, some of which are important.
See the Walkthrough to guide you in making a fairly simple browser application, including a little JQuery/Javascript.
Finally, there are some useful Tips to nudge you along the path towards producing truly dynamic web pages!