show a cross on loaded image

[dimsis]

I need a small applet that take as parameters:
An image file name
The X and Y values that represent the horizontal and vertical position on the image. A specific spot. (in pixels)

The applet must load the image, and display a cross (or something like that) on the X/Y spot.
If it can zoom the image it's much better.

I'll appreciate any help,
Thanx in advance,
Dimitris