织梦ajax跨域提交自定义表单和跨域验证码问题

A站(www.a.com)，有个form表单，ajax提交到 B站(www.b.com)，还附带个验证码

A站上的表单代码如下

01 <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/1.6.4/jquery.min.js"></script> 02 <script> 03 function send(){ 04     $.ajax({ 05         cache:true, 06         type:"POST", 07         url:"http://www.b.com/plus/diy.php", 08         data:$('#diyform').serialize(), 09         xhrFields:{withCredentials: true}, //ajax跨域提交需要 10         crossDomain:true, //ajax跨域提交需要 11         success: function(data){ 12             if(data=="success"){ 13                 alert('发送成功!'); 14             }else{ 15                 alert('发送失败!'); 16             } 17         } 18     }); 19 } 20 </script> 21 <form action="" enctype="multipart/form-data" method="post" id="diyform"> 22     <input type="hidden" name="action" value="post" /> 23     <input type="hidden" name="diyid" value="2" /> 24     <input type="hidden" name="do" value="2" /> 25     <input type="hidden" name="dede_fields" value="name,text" /> 26     <input type="hidden" name="dede_fieldshash" value="c2be5bb5ec45d9d01ca9f60dc469b3fb" /> 27     <p> 28         姓名： 29         <input type='text' name='name' id='name' /> 30     </p> 31     <p> 32         验证码： 33         <input type="text" name="validate"><img src="http://www.b.com/include/vdimgck.php" align="absmiddle" onclick="this.src='http://www.b.com/include/vdimgck.php?tag='+Math.random();" style="cursor:pointer;"> 34     </p> 35     <div onclick="send()">提交</div> 36 </form>

1、提交到 http://www.b.com/plus/diy.PHP

2、验证码 http://www.b.com/include/vdimgck.PHP

3、ajax 跨域必需js代码

xhrFields:{withCredentials: true}, crossDomain:true,

B站上的 /plus/diy.PHP 文件上面加入

1 header("Access-Control-Allow-Credentials:true"); 2 header("Access-Control-Allow-Origin:http://www.a.com");