navpagecur = 0;
  function shownavpage(index) {
	n = "navpage"+index;

	divs = document.getElementsByTagName("div");
	for (i = 0; i < divs.length; i++) {
		if (i == divs.length) break;
		if (divs[i].id == n) {
			divs[i].style.visibility = "visible";
		}
		else {
			divs[i].style.visibility = "hidden";
		}
	}

  }