How to make a calendar for appointments

Hi, a doctor friend of mine asked me to help him with his practice site. He wants to add a calendar where her patients can make appointments. Im not very learned on html so I'm looking for help here. Thank you.

That's kind of advanced and kind of risky cause let the patients mess your site can result in a terrible thing. But this are somethings you will need to use (i recommend to focus in one at a time) :

*A calendar, either a serverside or clientside one connected to a database

*A form to get data from the patient

*A database to store/change apointments. The calendar doesnt store a thing, it will only display dates. This database will be the memory of the calendar

*A database to store the record (users/password lists) of people that can make/edit appointments

*An action file to get the form data and store it on the database
otherwise, on this link you will find a very usefull example of a very useless table that "looks" like what you want to do, http://www.scriptingok.com/forum/viewtopic.php?f=5&t=895