function init() {
 initNavi();
}
function initIE() {
 if (document.readyState == "complete") {
  init();
 }
}
/** ---- initialize page ---- **/
if (typeof(document.onreadystatechange) == 'undefined') {
 try {
  window.addEventListener('onload', 'init', false);
 } catch(e) {
  window.onload = init;
 }
} else {
 document.onreadystatechange = initIE;
}
var nav = null;
function moveNavi() {
 var ofY = document.documentElement.scrollTop;
 if (ofY != 'NaN' && ofY > 101) {
  var rofY = parseInt(nav.style.top);
  var d = Math.abs(ofY - rofY);
  try {
    nav.style.top = rofY + (ofY - rofY > 0 ? d/4 : -d/4) + 'px'; 
  } catch(e) {}
 } else {
   nav.style.top  = '101px'; 
 }
}
function initNavi() {
 if (document.getElementById) {
  nav = document.getElementById("navigation");
  if (nav && nav.clientHeight < 600) {
   window.setInterval("moveNavi()",1);
   nav.style.left = '0px';
   nav.style.position = 'absolute';
  }
 }
}