xmlhttp.send不适用于特定服务器

Question

以下脚本可以在我自己的服务器上运行，但在我将其上传到我的webhost后，它不会将变量发送到php文件。是什么导致了这个问题？

（警告框可以显示变量，但php脚本使用空的vars运行）

剧本：

function showHQ(str)

{

var hq_kat = document.getElementById('hq_kat').value;
var hq_terulet = document.getElementById('hq_terulet').value;
var hq_rend = document.getElementById('hq_rend').value;
var hq_megj = document.getElementById('hq_megj').value;
var hq_r = document.getElementById('hq_r').value;

if (str=="")
  {
  document.getElementById("results").innerHTML="";
  return;
  } 
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("results").innerHTML=xmlhttp.responseText;
    }
  }

var queryString = "?hq_kat=" + hq_kat ;
queryString +=  "&hq_terulet=" + hq_terulet;
queryString +=  "&hq_rend=" + hq_rend;
queryString +=  "&hq_megj=" + hq_megj;
queryString +=  "&hq_r=" + hq_r;
xmlhttp.open("GET", "search.php" + queryString, true);
xmlhttp.send();
//alert(queryString);
}

{ var hq_kat = document.getElementById('hq_kat').value; var hq_terulet = document.getElementById('hq_terulet').value; var hq_rend = document.getElementById('hq_rend').value; var hq_megj = document.getElementById('hq_megj').value; var hq_r = document.getElementById('hq_r').value; if (str=="") { document.getElementById("results").innerHTML=""; return; } if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById("results").innerHTML=xmlhttp.responseText; } } var queryString = "?hq_kat=" + hq_kat ; queryString += "&hq_terulet=" + hq_terulet; queryString += "&hq_rend=" + hq_rend; queryString += "&hq_megj=" + hq_megj; queryString += "&hq_r=" + hq_r; xmlhttp.open("GET", "search.php" + queryString, true); xmlhttp.send(); //alert(queryString); }