jQuery中get方法用法分析

<form id="form1" action="#">
<p>评论:</p>
 <p>姓名: <input type="text" name="username" id="username" /></p>
 <p>内容: <textarea name="content" id="content" rows="2" cols="20"></textarea></p>
 <p><input type="button" id="send" value="提交"/></p>
</form>

<div class='comment'>已有评论：</div>
<div id="resText" >
</div>

<script type="text/javascript">
//<![CDATA[
 $(function(){
  $("#send").click(function(){
   $.get("get1.php", { 
      username : $("#username").val() , //传入参数
      content : $("#content").val() 
     }, function (data, textStatus){
      $("#resText").html(data); // 把返回的数据添加到页面上
     }
   );
  })
 })
//]]>
</script>

<?php 
  header("Content-Type:text/html; charset=utf-8");
  echo "<div class='comment'><h6>{$_REQUEST['username']}:</h6><p class='para'>{$_REQUEST['content']}</p></div>";
?>

<script type="text/javascript">
//<![CDATA[
 $(function(){
  $("#send").click(function(){
   $.get("get2.php", { 
      username : $("#username").val() , 
      content : $("#content").val() 
     }, function (data, textStatus){
      var username = $(data).find("comment").attr("username");
      var content = $(data).find("comment content").text();
      var txtHtml = "<div class='comment'><h6>"+username+":</h6><p class='para'>"+content+"</p></div>";
      $("#resText").html(txtHtml); // 把返回的数据添加到页面上
     });
  })
 })
//]]>
</script>

<?php 
  header("Content-Type:text/xml; charset=utf-8");
  echo "<?xml version='1.0' encoding='utf-8'?>".
     "<comments>".
     "<comment username='{$_REQUEST['username'] }' >".
     "<content>{$_REQUEST['content']}</content>".
     "</comment>".
     "</comments>";
?>