<script type="text/javascript">function selectInput(oSelect) {var value= oSelect.value;var url = "2.php";var postStr   = "value=http://www.mamicode.com/"+ value ;//--------------------------------------------------------------------------------//实例化Ajax//var ajax = InitAjax();          var ajax = false;         //开始初始化XMLHttpRequest对象         if(window.XMLHttpRequest) { //Mozilla 浏览器                 ajax = new XMLHttpRequest();                 if (ajax.overrideMimeType) {//设置MiME类别                         ajax.overrideMimeType("text/xml");                 }         }         else if (window.ActiveXObject) { // IE浏览器                 try {                         ajax = new ActiveXObject("Msxml2.XMLHTTP");                 } catch (e) {                         try {                                 ajax = new ActiveXObject("Microsoft.XMLHTTP");                         } catch (e) {}                 }         }         if (!ajax) { // 异常，创建对象实例失败                 window.alert("不能创建XMLHttpRequest对象实例.");                 return false;         }//--------------------------------------------------------------------------------------------                ajax.open("POST", url, true);ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");ajax.send(postStr);//----------------------------------------------------------------------------------------------ajax.onreadystatechange = function() {    //如果执行状态成功，那么就把返回信息写到指定的层里   if (ajax.readyState == 4 && ajax.status == 200) {     msg.innerHTML = ajax.responseText; //写入到id为msg的div里   } } //-------------------------------------------------------------------------------------------------}</script> <div id="msg"></div>  <?php $cnx = new PDO("odbc:Driver={SQL Server};Server=(local);Database=DBCT_Dev;",‘sa‘,‘123456‘); //连接数据库 ?><select onchange="selectInput(this)"">  <?php$Province=$cnx->query("select ProvinceName,ProvinceId from S_Province");foreach($Province as $sheng){    echo "<option value=http://www.mamicode.com/‘".$sheng[‘ProvinceId‘]."‘>".$sheng[‘ProvinceName‘]."</option>";    }?></select>

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