ajax 無重新整理建立與發送顯示代碼

這是一款簡單的哦，我們先是建立ajax對象然後再發送給php檔案，最後傳回值，

<SCRIPT type="text/javascript">
<!--
 var xmlHttp;
 function creatXMLHttpRequest() {
  if(window.ActiveXObject) {
   xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');
  } else if(window.XMLHttpRequest) {
   xmlHttp = new XMLHttpRequest();
  }
 }

 function startRequest() {
  var queryString;
  var domain = "<?=$ip?>";
  queryString = "q=" + domain;
  creatXMLHttpRequest();
  xmlHttp.open("POST","./?action=do","true");
  xmlHttp.onreadystatechange = handleStateChange;
  xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
  xmlHttp.send(queryString);
 }

 function handleStateChange() {
  if(xmlHttp.readyState == 1) {
   document.getElementById('ipresult').style.cssText = "";
   document.getElementById('ipresult').innerHTML = '<span class="green">結果載入中，請稍等...</span>';
  }
  if(xmlHttp.readyState == 4) {
   if(xmlHttp.status == 200) {
    document.getElementById('ipresult').style.cssText = "";
    var allcon =  xmlHttp.responseText;
    document.getElementById('ipresult').innerHTML = allcon;
   }
  }
 }
 
//-->
</SCRIPT>