function invert(strEar, boolInvert)
			{
				if (boolInvert)
				{
					document.getElementById(strEar).style.backgroundImage = "url(images/" + strEar + "invert.gif)";
				}
				else
				{
					document.getElementById(strEar).style.backgroundImage = "url(images/" + strEar + ".gif)";
				}
			}