This example demonstrates the difference between onmousemove, onmouseenter and onmouseover. It will count the number of times each one is triggered

onmousemove:
Mouse over me!

I am some extra text! Here are the coordinates of the event:

onmouseenter:
Mouse over me!

I am some extra text! Here are the coordinates of the event:

onmouseover:
Mouse over me!

I am some extra text! Here are the coordinates of the event: