xmlhttp无效

Question

我不确定我做错了什么。我将它放在尸体中，旁边是div myDiv，似乎没有跑，所以我不知道我做错了什么。

<script type="text/javascript" language="javascript">
  var xmlhttp;
  if (window.XMLHttpRequest) {
  // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp=new XMLHttpRequest();
  } else {
  // code for IE6, IE5
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
  xmlhttp.open("GET","http://www.example.com/test.php",false);
  xmlhttp.send();
  document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
</script>
<div id="myDiv"></div>

Answer 1

脚本在渲染div“myDiv”之前运行。交换它们......

<div id="myDiv"></div>

<script type="text/javascript" language="javascript">
var xmlhttp;
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
} else {
// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","http://www.example.com/test.php",false);
xmlhttp.send();
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;