// cache menu button rollover images
if (document.images) {
	activeImage = new Array(3);
	for (i = 0; i < activeImage.length; i++){
	  activeImage[i] = new Image;
	  activeImage[i].src =("media/nav"+[i]+"on.gif");
	}
	inactiveImage = new Array(3);
	for (j = 0; j < inactiveImage.length; j++){
	  inactiveImage[j] = new Image;
	  inactiveImage[j].src = ("media/nav"+[j]+"off.gif");
	}
}

    //change out button to active image
function changeActive(current, num) {
	  if (document.images) {
	  document[current].src = activeImage[num].src;
	  }
}

    //change back button to inactive image
function changeInactive(current, num) {
	  if (document.images) {
	  document[current].src = inactiveImage[num].src;
	  }
}