Some applications require the exact position of the mouse.
The coordinates of the mouse can be found from the event object. In Internet Explorer, the x and y coordinates of the mouse are given by the clientX and clientY properties, respectively. In Netscape Navigator, on the other hand, they are given by pageX and pageY , respectively. This tip is setup to print, upon clicking, the location of the mouse. Try clicking in this window and see the exact coordinates poping up.