var IE = document.all?true:false;
if (!IE) document.captureEvents(Event.MOUSEMOVE)
document.onmousemove = getMouseXY;
document.onmousePressed = document.history(-1)
var tempX = 0;
var tempY = 0;

function getMouseXY(e) {
if (IE) { // grab the x-y pos.s if browser is IE
tempX = event.clientX + document.body.scrollLeft;
tempY = event.clientY + document.body.scrollTop;
szerokosc_dokumentu = document.body.scrollWidth;
wysokosc_dokumentu = document.body.scrollHeight;
}
else { // grab the x-y pos.s if browser is NS
tempX = e.pageX;
tempY = e.pageY;
szerokosc_dokumentu = document.width;
wysokosc_dokumentu = document.height;
}
if (tempX < 0){tempX = 0;}
if (tempY < 0){tempY = 0;}
return true;
}