Applet shows the vector C, which is the cross product of A and B and is at right angles to the plane of A and B. You have the option of displaying the plane of A and B or see the vectors without such a plane. The vectors can be expressed using spherical polar coordinates or cartesian coordiantes.
Dragging with the mouse in the applet area rotates the axes. If at all you need to shift the origin, double click in the applet area and the origin will shift to the point where you double clicked.
Please note that the vector C is not drawn to the same scale as A and B.