var _elementID;
var _xOffset = 15;
var _yOffset = 15;

function GetMouseX(event) {
	if (!event) {
		event = window.event;
	}
	if (event.pageX) {
		return event.pageX;
	} else if (event.clientX) {
		return event.clientX
				+ (document.documentElement.scrollLeft ? document.documentElement.scrollLeft
						: document.body.scrollLeft);
	} else {
		return 0;
	}
}

function GetMouseY(event) {
	if (!event) {
		event = window.event;
	}
	if (event.pageY) {
		return event.pageY;
	} else if (event.clientY) {
		return event.clientY
				+ (document.documentElement.scrollTop ? document.documentElement.scrollTop
						: document.body.scrollTop);
	} else {
		return 0;
	}
}

function Follow(event) {
	if (document.getElementById) {
		var element = document.getElementById(_elementID);

		if (element != null) {
			var style = element.style;
			style.left = (parseInt(GetMouseX(event)) + _xOffset) + 'px';
			style.top = (parseInt(GetMouseY(event)) + _yOffset) + 'px';
			style.visibility = 'visible';
		}
	}
}

function Show(elementID) {
	if (document.getElementById) {
		_elementID = elementID;
		document.onmousemove = Follow;
	}
}

function Hide(elementID) {
	if (document.getElementById) {
		_elementID = elementID;
		var divStyle = document.getElementById(_elementID).style;
		divStyle.visibility = 'hidden';
		document.onmousemove = '';
	}
}