tooltip = null;
document.onmousemove = updateTooltip;

function updateTooltip(e) {
	try {
		x = (document.all) ? window.event.x + document.documentElement.scrollLeft: e.pageX;
		y = (document.all) ? window.event.y + document.documentElement.scrollTop: e.pageY;
		
		if (tooltip != null) {
			tooltip.style.left = (x + 20) + "px";
			tooltip.style.top = (y - 80) + "px";
		}
	} catch (error) { error=null; }
}

function showTooltip(id) {
	try {
		tooltip = document.getElementById(id);
		tooltip.style.display = "block"
	} catch (error) { error=null; }
}

function hideTooltip() {
	try {
		tooltip.style.display = "none";
	} catch (error) { error=null; }
}