作为响应，jsonp用第二个值覆盖第一个值

This is my jsonp code in which i am getting the data from online server and want to show in my 2 divs which is title and description. But the code is replacing my first div with the last content loaded by ajax_reponse.

function ajax_request() {
  jsonp("http://example.com/jSonApi/json_data.php", 
        "ajax_response");
}

/**Response (Called when data has been retrieved)
 *
 * @param   object  data   Javascript (JSON) data object received
 *                         through <script> request
 */
function ajax_response(data) {
  for(var key in data) {
        document.getElementById("first").innerHTML=data[key];
  }
}

function jsonp(url, callback)
{                
    if (url.indexOf("?") > -1) {
        url += "&jsonp="; 
    }
    else {
        url += "?jsonp="; 
    }
    url += callback + "&";
    url += new Date().getTime().toString(); // prevent caching        

    var script = document.createElement("script");        
    script.setAttribute("src",url);
    script.setAttribute("type","text/javascript");                
    document.getElementsByTagName('head')[0].appendChild(script);
}

This is my PHP code

<?php 
// Connection to the database
include("connection.php");
  $startQuery = mysql_query("select * from image_gallery where recid=474") or die (mysql_error());
    if (mysql_num_rows($startQuery)>0){
      $rs=mysql_fetch_array($startQuery);
          $title = $rs["gallerytitle_en"];
          $descp =trim(preg_replace('/\s\s+/', ' ', $rs["gallerydescp_en"]));
          $jsonData=array("data_1" => $title , "data_2" => $descp);

      }
  mysql_free_result($startQuery); 
echo $_REQUEST["jsonp"]."(".json_encode($jsonData).")";


?>

It makes sense that's it doing that because your code is telling it to:

document.getElementById("first").innerHTML=data[key];

Your for should be a for each:

for each(var key in data) {
    document.getElementById("first").innerHTML=data[key];
}

Your code says replace the innerHTML with the value you got from the server.

If your complaint is that the response is the LAST response then your request is being cached by the server.