function addFilter(obj){
  
  ul = document.getElementById("items");
  
  if (document.createElement){
    node_li = document.createElement("li");
    ul.appendChild(node_li);
  }
  
  httpObj = createXMLHttpRequest(displayData);
  
  if (httpObj){
    httpObj.open("GET","http://smartfeed.openvista.jp/includes/item.html",true);
    httpObj.send(null);
  }
  
}

function displayData(){
  
  li = document.getElementById("items").lastChild;
  
  if ((httpObj.readyState == 4) && (httpObj.status == 200)){
    li.innerHTML = httpObj.responseText;
  } else{
    li.innerHTML = "<em>追加しています…</em>";
  }
}

function delFilter(obj){
  
  var element = obj.parentNode;
  var parent = element.parentNode
  parent.removeChild(element);
  
}

function bookmarkChange(obj){
  
  selected = obj.options[obj.selectedIndex].value;
  
  // 1つ目のselect要素か否か
  if (obj.parentNode.parentNode.firstChild == obj.parentNode){
    
    if (selected == "bookmark"){
      obj.parentNode.childNodes[7].style.display = "none";
      obj.parentNode.childNodes[5].style.display = "inline";
      obj.parentNode.childNodes[3].size = "5";
    } else{
      obj.parentNode.childNodes[7].style.display = "inline";
      obj.parentNode.childNodes[5].style.display = "none";
      obj.parentNode.childNodes[3].size = "15";
    }
    
  } else{
    
    if (selected == "bookmark"){
      obj.parentNode.childNodes[8].style.display = "none";
      obj.parentNode.childNodes[6].style.display = "inline";
      obj.parentNode.childNodes[4].size = "5";
    } else{
      obj.parentNode.childNodes[8].style.display = "inline";
      obj.parentNode.childNodes[6].style.display = "none";
      obj.parentNode.childNodes[4].size = "15";
    }
    
  }
  
}