ajax傳值給php

test.php

 

<script type="text/javascript">



function selectInput(oSelect) {
var value= oSelect.value;
var url = "2.php";
var postStr   = "value="+ value ;


//--------------------------------------------------------------------------------
//實例化Ajax
//var ajax = InitAjax();
          var ajax = false;
         //開始初始化XMLHttpRequest對象
         if(window.XMLHttpRequest) { //Mozilla 瀏覽器
                 ajax = new XMLHttpRequest();
                 if (ajax.overrideMimeType) {//設置MiME類別
                         ajax.overrideMimeType("text/xml");
                 }
         }
         else if (window.ActiveXObject) { // IE瀏覽器
                 try {
                         ajax = new ActiveXObject("Msxml2.XMLHTTP");
                 } catch (e) {
                         try {
                                 ajax = new ActiveXObject("Microsoft.XMLHTTP");
                         } catch (e) {}
                 }
         }
         if (!ajax) { // 異常，創建對象實例失敗
                 window.alert("不能創建XMLHttpRequest對象實例.");
                 return false;
         }
//--------------------------------------------------------------------------------------------                



ajax.open("POST", url, true);
ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
ajax.send(postStr);



//----------------------------------------------------------------------------------------------
ajax.onreadystatechange = function() { 
   //如果執行狀態成功，那么就把返回信息寫到指定的層里
   if (ajax.readyState == 4 && ajax.status == 200) { 
    msg.innerHTML = ajax.responseText; //寫入到id為msg的div里
   } 
} 
//-------------------------------------------------------------------------------------------------
}
</script> 





<div id="msg"></div>  


<?php $cnx = new PDO("odbc:Driver={SQL Server};Server=(local);Database=DBCT_Dev;",'sa','123456'); //連接數據庫 ?>


<select onchange="selectInput(this)"">  
<?php
$Province=$cnx->query("select ProvinceName,ProvinceId from S_Province");
foreach($Province as $sheng){
    echo "<option value='".$sheng['ProvinceId']."'>".$sheng['ProvinceName']."</option>";
    }?>
</select>

 

2.php

 

<?php  
     print_r ($_POST['value']);  
?>