var offset = 10;
function muda() {
	noz.style.display = '';
	var de = document.documentElement;
    var b = document.body;
	var e = e || window.event;
	if (e.pageX || e.pageY) {
        noz.style.left = e.pageX + offset;
        noz.style.top = e.pageY + offset;
    } else {
		noz.style.left = e.clientX + (de.scrollLeft || b.scrollLeft) - (de.clientLeft || 0) + offset;
		noz.style.top = e.clientY + (de.scrollTop || b.scrollTop) - (de.clientTop || 0) + offset;
	}
}