var mouseX, mouseY;
if(window.Event && document.captureEvents)
document.captureEvents(Event.MOUSEMOVE);			
document.onmousemove = getMousePos;

var nIDlayer;

function getMousePos(e) {
	/*special pro nejprodavanejsi */
	if (nIDlayer != "") {
		if (document.getElementById(nIDlayer)) {
			if (mouseX < X1 || mouseX > X2 || mouseY < Y1 || mouseY > Y2) {
				document.getElementById(nIDlayer).style.display = "none";
				nIDlayer = "";
			}
		}
	}
	/* standart zjisteni */
	if (!e)
		var e = window.event||window.Event;
	
	if('undefined'!=typeof e.pageX) {
		mouseX = e.pageX;
		mouseY = e.pageY;
	}
	else {
		mouseX = e.clientX + document.documentElement.scrollLeft;
		mouseY = e.clientY + document.documentElement.scrollTop;
	}
}