function ajax() {

  var response = $("from_wp");
  response.innerHTML = "Loading...";

  var date = new Date();
  var timestamp = date.getTime();

  var url = "/from_wp/db_access.cgi?time=" + timestamp;

  var paramList = "";

  new Ajax.Request(url,
    {
      method: 'get',
      onSuccess: getData,
      onFailure: showErrMsg,
      parameters: paramList
  });

  function getData(data){
	//整形処理をここに書く
	var jason = data.responseText.evalJSON();// JSON形式で受け取る

	var content="";
	for(var i=0; i<jason.length; i++){
		content = content + '<p><b>' + jason[i]["post_date"]+'</b><a href="'+jason[i]["link"]+'">'+jason[i]["post_title"] +'</a></p>';
	}

	response.innerHTML = content;
  }

  function showErrMsg(){
	result.innerHTML = "no data";
  }
}

Event.observe(window, "load", function(){
	ajax();
});