<body>
<script>
document.addEventListener('mousemove', onMouseMove)
function onMouseMove(){
document.body.innerHTML += 'mousemove<br>';
//document.removeEventListener('mousemove', onMouseMove);
}
</script>
</body>
<body>
<script>
document.addEventListener('mousemove', onMouseMove)
function onMouseMove(){
document.body.innerHTML += 'mousemove<br>';
document.removeEventListener('mousemove', onMouseMove);
}
</script>
</body>