<meta charset="utf-8">   <meta http-equiv="X-UA-Compatible" content="IE=edge">   <title>無(wú)刷新用戶(hù)注冊(cè)界面</title>   <link rel="stylesheet" href=""> <script>
  //創(chuàng)建XMLHttpRequest對(duì)象
  function createXhr(){
    var xhr = null;
    if(window.XMLHttpRequest){
      xhr = new XMLHttpRequest();//谷歌、火狐等瀏覽器
    }else if(window.ActiveXObject){
      xhr = new ActiveXObject("Microsoft.XMLHTTP");//ie低版本
    }
    return xhr;
  }
  //注冊(cè)方法
  function reg(){
    //1、獲取準(zhǔn)備Post內(nèi)容
    var username = document.getElementsByName('username')[0].value;
    var email = document.getElementsByName('email')[0].value;
    //2、創(chuàng)建XMLHttpRequest對(duì)象
    var xhr = createXhr();
    //3、確定請(qǐng)求參數(shù)
    xhr.open('POST','./06-ajax-reg.php',true);
    xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
    //4、重寫(xiě)回調(diào)函數(shù)
    xhr.onreadystatechange = function(){
      if(this.readyState == 4 && this.status == 200){
        //使用服務(wù)器端返回值
        var regres = document.getElementById('regres');
        regres.innerHTML = this.responseText;
      }
    }
    //5、發(fā)送請(qǐng)求
    var content = 'username='+username+'&email='+email;
    xhr.send(content);
    return false;//不跳轉(zhuǎn)頁(yè)面
  }
</script>
  <h1>無(wú)刷新用戶(hù)注冊(cè)界面</h1>
  <form onsubmit="return reg();">     用戶(hù)名：<input type="text" name="username" />     郵箱：<input type="text" name="email" />     <input type="submit" value="注冊(cè)" />   </form>   

/**
 * ajax注冊(cè)程序
 * @author webbc
 */
header('Content-type:text/html;charset=utf-8');
if(trim($_POST['username']) == '' || trim($_POST['email']) == ''){
  echo '內(nèi)容填寫(xiě)不完整';
}else{
  print_r($_POST);
  echo '注冊(cè)成功';
}

xhr.setRequestHeader('Content-Type','application/x-www-form-urlencoded');