jquery ajax范例

<script src="jquery/jquery-1.3.2.min.js" type="text/javascript"></script><script src="jquery/jquery.form.js" type="text/javascript"></script><script type="text/javascript">$(function(){  $("#submit").bind("click",function(){   $.ajax({     type:"POST",     url:"register.aspx",     data:"UserName="+$("#username").val()+"&PassWord="+$("#pwd").val()+"Mail="+$("#mail").val(),     success:function(msg){     //alert(msg);     }   })  })})</script>

   protected void Page_Load(object sender, EventArgs e)    {        if (!Page.IsPostBack)        {            Response.Write(Request.Form["username"]);//写不出来        }                  }