Tooltip = null;

document.onmousemove = updateTooltip;

function updateTooltip(e) {
	x = (document.all) ? window.event.x + document.body.scrollLeft : e.pageX;
	y = (document.all) ? window.event.y + document.body.scrollTop  : e.pageY;
	if (Tooltip != null) {
		Tooltip.style.left = (x + 20) + "px";
		Tooltip.style.top 	= (y + 20) + "px";
	}
}

function showTooltip(id) {
	Tooltip = document.getElementById(id);
	Tooltip.style.display = "block"
}

function hideTooltip() {
	Tooltip.style.display = "none";
}