function changeNavButtons(imageNumber) {

	/* Build code for gallery nav buttons */
	var code = "";
	
	if (imageNumber != '01') {
	  var prev = imageNumber - 1;
	  if (prev < 10)
	   {
      prev = '0' + prev;
     }
		
		code = '<a href=\"javascript:changePhoto(ContentLocation, Title, \'' + prev +'\');\"><img src=\"/travel/previous.gif\" border=\"0\" alt=\"previous image\"></a> ';
		
	}
	else
  {
    code = code + '<img src=\"/travel/blank.gif\" border = \"0\" width=\"40\" height=\"40\"> ';
  }
		
	code = code + '<a href=\"' + ContentLocation + '\"><img src=\"/travel/up.gif\" border=\"0\" alt=\"back to menu\"></a> ';

	if (parseFloat(imageNumber) != Last) {
  	var next = parseFloat(imageNumber) + 1;
	  if (next < 10)
	   {
      next = '0' + next;
     }

		code = code + '<a href=\"javascript:changePhoto(ContentLocation, Title, \'' + next +'\');\"><img src=\"/travel/next.gif\" border=\"0\" alt=\"next image\"></a>';
  }
  else
  {
    code = code + '<img src=\"/travel/blank.gif\" border = \"0\" width=\"40\" height=\"40\">';
  }
	
	document.getElementById('galleryNav').innerHTML= code;
	
}

changeNavButtons('01');