function changeImage( id, sampleColour )
{
	var sample = document.getElementById( "largeImage" );
	var colourSample = document.getElementById( "colourPoint" );
	
	var oldChild = colourSample.firstChild;
	var newChild = document.createTextNode( "Shade: " + sampleColour );
	
	colourSample.replaceChild( newChild, oldChild );

	sample.src = "/media/images/samples/large/" + id + ".gif";
}