Below is an example form, using methods of GET and POST. POST is preferred for longer input, since some systems may impose a byte limit on input for GET. GET is preferred where one wishes to bookmark the URL including the query values.
Note that the Jot input only works with a few browsers (Mosaic for X11) - it allows you to draw a picture and send that, like entering data on a pen-based palmtop. Image input does not work properly on some browsers.