function showDiv(imageSource,id)
{
	var imageName = "images/" + imageSource + "-white.jpg";
	document.getElementById(imageSource).src= imageName;
	document.getElementById(id).style.display='block';	
}

function hideDiv(imageSource,id)
{
	var imageName = "images/" + imageSource + "-black.jpg";
	document.getElementById(imageSource).src= imageName;
	document.getElementById(id).style.display='none';
	
}