var IE  = document.all?true:false;
var NS4 = document.layers?true:false;
var NS6 = (document.getElementById&&!document.all)?true:false;

if (!IE) document.captureEvents(Event.MOUSEMOVE)
document.onmousemove = getMouseXY;

function getMouseXY(e) {
if (IE) { // grab the x-y pos.s if browser is IE
posX = event.clientX + document.body.scrollLeft;
posY = event.clientY + document.body.scrollTop;
}
else {  // grab the x-y pos.s if browser is NS
posX = e.pageX;
posY = e.pageY;
}
if (posX < 0){posX = 0;}
if (posY < 0){posY = 0;}
return true;
}