// Funkce, ktera zjistuje souradnice mysi a pripadne levy offset
if (typeof mouseCoord != 'function') {
	function mouseCoord(e) {
		if (!e) var e = window.event;
		if (e.pageX || e.pageY) 	{
			posx = e.pageX;
			posy = e.pageY;
		}
		else if (e.clientX || e.clientY) 	{
			posx = e.clientX + document.body.scrollLeft
				+ document.documentElement.scrollLeft;
			posy = e.clientY + document.body.scrollTop
				+ document.documentElement.scrollTop;
		}
		return new Array(posx, posy);
	}
}

if (typeof mouseCoordRelative != 'function') {
	function mouseCoordRelative(e) {
		posx = 0; posy = 0;
		if (!e.pageX) { posx = e.offsetX + e.clientX; posy = e.offsetY + e.clientY; }
		else {
			posx = e.pageX;
			posy = e.pageY;
		}
		return new Array(posx, posy);
	}
}

if (typeof getLeftOffset != 'function') {
	function getLeftOffset() {
		return document.getElementById('obsah').offsetParent.offsetLeft - 136;
	}
}