Cacher is the code snippet organizer for pro developers

// Get the X position of the mouse relative to the element target used in event object 'e'
function getElementX(e) {
	// Find the appropriate element offset
	return ( e && e.layerX ) || window.event.offsetX;
}

// Get the Y position of the mouse relative to the element target used in event object 'e'
function getElementY(e) {
	// Find the appropriate element offset
	return ( e && e.layerY ) || window.event.offsetY;
}