function init() {
  if (window.Event) {
    document.captureEvents(Event.MOUSEMOVE);
  }
  document.onmousemove = getXY;
}
function getXY(e) {
  x = (window.Event) ? e.pageX : event.clientX;
  y = (window.Event) ? e.pageY : event.clientY;
  vypni(x);
}

function zobraz(i) {
	povodne = Math.round(document.body.clientWidth / 2) - 400;
	posun = new Array(80, 150, 235, 351, 497);
	
	for (j=1; j<5; j++) {
	suradnica = povodne + posun[j];
	suradnica = suradnica + 'px';
	nazov = 'menu' + j;
	document.getElementById(nazov).style.left = suradnica;
	document.getElementById(nazov).style.display='none';
	}
	nazov = 'menu' + i;
	document.getElementById(nazov).style.display='block';
}
function nezobraz(i) {
	nazov = 'menu' + i;
	document.getElementById(nazov).style.display='none';
}
function vypni(poz) {
		posun = new Array(80, 150, 235, 351, 497);
	povodne = Math.round(document.body.clientWidth / 2) - 400;
	for (i=1; i<5; i++) {
		nazov = 'menu' + i;
		l = nazov + 'l';
		p = nazov + 'p';
		nalavo = povodne + posun[i] - 10;
		napravo = nalavo + 20 + 153;
		if (poz < nalavo && document.getElementById(nazov).style.display=='block') document.getElementById(nazov).style.display='none';
		if (poz > napravo && document.getElementById(nazov).style.display=='block') document.getElementById(nazov).style.display='none';
	}
}
function skry() {
	for (j=1; j<5; j++) {
		nazov = 'menu' + j;
		document.getElementById(nazov).style.display='none';
	}
}