Hey guys, i got a few question that i hope to get answered here so i hope i don't take too much of you time :)

basically this would be my first php "project" if you can even call it that :)
just as a side note my php coding knowledge is basic at most and i'm still learning...

The Theory part:
I wish to make a page that tracks the work time of several people and displays some information about it in real time on the same page.

The practical part:
2 buttons - Start and end work day. that allow me to start the counting the how much time has passed from the moment the work day started

1 Text field + add button - to be able to add works before and during the work day (if some one for example joined mid way.

1 table to display all the data.


Now for the questions:
How should i go about making this?
can this be done with php by it self or do i need to use something like AJAX?
will i need a MySQL database?

thank you in advance
Vartan