[jQuery] How to create a div by click + drag

[jQuery] How to create a div by click + drag


Hi,
i have a question on what function to use to create a funciton to
create a div by clicking somewhere on the parrent div and dragging
down to determine the div size.
To give you a better idea of what i mean here is a link of the DHTML
week planner demo.
http://www.dhtmlgoodies.com/scripts/dhtmlgoodies-week-planner/dhtmlgoodies-week-planner.html
You will see that you can create a new event in the planner by
clicking anywhere and dragging your mouse down. I am working on a
simmilar project and any on this subject help would be greatly
appreciated.
Thanks.
N.