Ajax的GET传值没有关问题，POST传值有有关问题！帮忙看看！

2012-04-16

Ajax的GET传值没问题，POST传值有问题！！！帮忙看看！！！！如果把这些代码改成GET方式就正常，而用POST方式时，在g

Ajax的GET传值没问题，POST传值有问题！！！帮忙看看！！！！
如果把这些代码改成GET方式就正常，而用POST方式时，在gethint.php里就获取不到post传来的数据，这是怎么回事？帮忙看看，谢谢！

共三个文件，如下：

1. text.php

PHP code

<html><head><script src="clienthint.js"></script></head><body><form>First Name:<input type="text" id="txt1"><input type="button" value="Submit" onClick="showHint()"></form><p>Suggestions: <span id="txtHint"></span></p></body></html>

2.clienthint.js

PHP code

var xmlHttpfunction showHint(){var str = document.getElementById("txt1").value;if (str.length==0)  {  document.getElementById("txtHint").innerHTML="";  return;  }xmlHttp=GetXmlHttpObject();if (xmlHttp==null)  {  alert ("Browser does not support HTTP Request");  return;  }var url="gethint.php";var content="qt="+str;content=content+"&sid="+Math.random();xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");//for postxmlHttp.onreadystatechange=stateChanged;xmlHttp.open("POST",url,true);xmlHttp.send(content);}function stateChanged(){if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { document.getElementById("txtHint").innerHTML=xmlHttp.responseText; }}function GetXmlHttpObject(){var xmlHttp=null;try {// Firefox, Opera 8.0+, Safari xmlHttp=new XMLHttpRequest(); }catch (e) { // Internet Explorer try  {  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");  } catch (e)  {  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");  } }return xmlHttp;}

3. gethint.php

PHP code

<?php// Fill up array with names$a[]="Anna";$a[]="Brittany";$q = $_POST["qt"];if (strlen($q) > 0){$hint="";for($i=0; $i<count($a); $i++)  {  if (strtolower($q)==strtolower(substr($a[$i],0,strlen($q))))    {    if ($hint=="")      {      $hint=$a[$i];      }    else      {      $hint=$hint." , ".$a[$i];      }    }  }}else echo "q is empty!<br>";//Set output to "no suggestion" if no hint were found//or to the correct valuesif ($hint == ""){$response="no suggestion";}else{$response=$hint;}//output the responseecho $response;echo " to ";echo $q;echo "<br>";?>

[解决办法]
....
var url="gethint.php&"+new Date().getTime();
var content="qt="+str;
//content=content+"&sid="+Math.random();
xmlHttp.open("POST",url,true);
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");//for post
xmlHttp.send(content);
....

function stateChanged(){
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
if (xmlhttp.status==200||xmlhttp.status==0){
document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
}
}
}

[解决办法]
把content加进去，别要那个true试试
[解决办法]
就是加个时间戳，防止浏览器缓存

调试：

JScript code

//xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");//for postxmlHttp.onreadystatechange=stateChanged;xmlHttp.open("POST",url,true);xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");//for post========
[解决办法]
探讨
就是加个时间戳，防止浏览器缓存

调试：
function stateChanged(){
alert(xmlHttp.readyState)
  if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
alert(xmlhttp.status)
  if (xmlhttp.status==200||xmlhttp.……

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