// HTTP通信用、共通関数
function createXMLHttpRequest(oFunc0){
  var XML_DOC = null;

  try{
    XML_DOC = new XMLHttpRequest();
  }catch(e){
    try{
      XML_DOC = new ActiveXObject("Msxml2.XMLHTTP");
    }catch(e){
      try{
        XML_DOC = new ActiveXObject("Microsoft.XMLHTTP");
      }catch(e){
        return null;
      }
    }
  }
  if (XML_DOC) XML_DOC.onreadystatechange = oFunc0;

  return XML_DOC;
}

function $(tagId){
  return document.getElementById(tagId);
}