var scrollobject_pageheight = 135;
var scrollpage_pageheight = 480;

function MoveMenu(sDirection, containerObj) {
//  alert(containerObj.offsetHeight);
  if (sDirection == 'down') {
    if (containerObj.offsetHeight + containerObj.offsetTop - scrollobject_pageheight > 0) containerObj.style.top = containerObj.offsetTop - scrollobject_pageheight +'px';
  } else {
    if (containerObj.offsetTop < 0) containerObj.style.top = containerObj.offsetTop + scrollobject_pageheight +'px';
  }
}


function MovePage(sDirection, containerObj) {
//  alert(containerObj.offsetHeight);
  if (sDirection == 'down') {
    if (containerObj.offsetHeight + containerObj.offsetTop - scrollpage_pageheight > 0) containerObj.style.top = containerObj.offsetTop - scrollpage_pageheight +'px';
  } else {
    if (containerObj.offsetTop < 0) containerObj.style.top = containerObj.offsetTop + scrollpage_pageheight +'px';
  }
}

function ActivatePageScroll(containerObj) {
  if (containerObj.offsetHeight > scrollpage_pageheight) {
    var uparrow = document.getElementById('pageobjUpArrow');
    var downarrow = document.getElementById('pageobjDownArrow');

    uparrow.style.display = 'block';
    downarrow.style.display = 'block';
  }
}