/**
 * 
 */

var element = null;
function mouseIn(myElement) {
	if (element != null) {
		mouseOut();
		exit;
	}
	element = document.getElementById(myElement);
	element.style.visibility = 'visible';
}
function mouseOut() {
	if (element != null) {
		element.style.visibility = 'hidden';
		element = null;
	}
}