function imageSwap(imageName,x)  //Swaps out highlighted and active versions of menu images
{
	if (x==0) document.getElementById(imageName).src="images/"+imageName+".png";
	if (x==1) document.getElementById(imageName).src="images/"+imageName+"-hover.png";
	if (x==2) document.getElementById(imageName).src="images/"+imageName+"-hover.png";
}