jQuery学习第八课(jquery中的ajax)

jquery中的ajax

1. jqueryDOM.load()

2. $.get()

3. $.post()

4. $.ajax()

--------------------------------test.html-------------------------

<body>
 <ul id="test1">
  <li>11111</li>
  <li>22222</li>
  <li>33333</li>
 </ul>
 <ul id="test2">
  <li>aaaaa</li>
  <li>cccccc</li>
  <li>ddddd</li>
 </ul>
</body>

-----------------------------demo1--------------------------------

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
 <title>demo1</title>
 <style>
  .load{width: 500px;height: 300px;border: 1px solid #abcdef;}
 </style>
 <script src="jquery.js"></script>
</head>
<body>
 <input type="button" value="加载" />
 <div class="load"></div>
 <script>
  $('input[type=button]').click(function(){
   $('.load').load('test.html?date='+Math.random()+' #test2');
  });
 </script>

 /*<script>
  $('input[type=button]').click(function(){
   $.get('test.txt?data='+Math.random(),function(data){
    $('.load').html(data);
   });
  });
 </script>*/
</body>
</html>

--------------------------------------------------------------------------------

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
 <title>demo</title>
 <script src="jquery.js"></script>
 <style>
  div{color:red;}
 </style>
</head>
<body>
 <input type="text" name="username" id="username" />
 <input type="button" value="检验" />
 <div></div>
 <script>
  $('input[type=button]').click(function(){
   //发送的参数 格式 必须 是json格式
   var send = {'username':$('#username').val()}
   $('div').load('process.php',send,function(data){
    alert(data);
   });
  });
 </script>

/*<script>
  $('input[type=button]').click(function(){
   var url = 'process.php';
   var sendData = {'username':$('#username').val()};
   
   $.get(url,sendData,function(data){
    if(data=='true'){
     $('div').html('用户名可以使用');
    }else{
     $('div').html('用户名不可以是admin');
    }
   });
  })
 </script>*/

/*<script>
  $('input[type=button]').click(function(){
   var url = 'process.php';
   var sendData = {'username':$('#username').val()};
   $.ajax({
    url:url,
    type:'post',
    data:sendData,
    success:function(data){
     if(data=='true'){
      $('div').html('用户名可以使用');
     }else{
      $('div').html('用户名不可以是admin');
     }
    }
   });
  })
 </script>*/
</body>
</html>

--------------------------process.php------------------------------

<?php
header('Content-type: text/html;chartset=utf-8');

$username = $_POST['username'];
// $username = $_GET['username'];
if($username=='admin'){
 echo 'false';
}else{
 echo "true";
}