function getloadText(direction) {
  var catID = document.getElementById('ctl00_ContentPlaceHolder1_lblCatID');
  var contentID = document.getElementById('ctl00_ContentPlaceHolder1_lblContentID');
  var viewOrder = document.getElementById('ctl00_ContentPlaceHolder1_lblViewOrder');
  var viewOrderMax = document.getElementById('ctl00_ContentPlaceHolder1_lblViewOrderMax');

  if (direction == 'u') {
    viewOrder.innerHTML = Number(viewOrder.innerHTML) + 1;
  }
  else {
    viewOrder.innerHTML = Number(viewOrder.innerHTML) - 1;
  }
  
  
  if (Number(viewOrder.innerHTML) >= Number(viewOrderMax.innerHTML)) {
    var btnNext = document.getElementById('iBtnNext');
    btnNext.disabled=true;
    btnNext.style.display='none';
  }
  else {
    var btnNext = document.getElementById('iBtnNext');
    btnNext.disabled=false;
    btnNext.style.display='';
  }
  
  if (Number(viewOrder.innerHTML) >= 2) {
    var btnPrev = document.getElementById('iBtnPrevious');
    btnPrev.disabled=false;
    btnPrev.style.display='';
  }
  else {
    var btnPrev = document.getElementById('iBtnPrevious');
    btnPrev.disabled=true;
    btnPrev.style.display='none';
  }      
  content.loadText(direction,catID.innerHTML,viewOrder.innerHTML,contentID.innerHTML,loadContent_CallBack);
  //isMarked();        
}

function loadContent_CallBack(response){
  if (response.error != null){
    alert(response.error);
    return;
  }
    if (response.value != null) {
      var newContent;
      newContent = document.getElementById('newContent');
      newContent.innerHTML = response.value;
  }
}