dedecms织梦会员登录二级域名跨域不能获取数据的解决办法

DedeXHTTP = new XMLHttpRequest();

DedeXHTTP.withCredentials = true;

DedeXHTTP.open("POST", purl, true);

DedeXHTTP.withCredentials = true;

DedeXHTTP.open("GET", purl, true);

DedeXHTTP.withCredentials = true;

DedeXHTTP.open("GET", purl, false);

DedeXHTTP.withCredentials = true;

header("Access-Control-Allow-Credentials:true");
header("Access-Control-Allow-Origin:http://m.genban.org");

Header set Access-Control-Allow-Origin "*"

add_header Access-Control-Allow-Origin *;

Access-Control-Allow-Origin：*

<script src="{wmd:global.cfg_basehost/}/include/dedeajax2.js"></script>
<script type="text/javascript">      
function CheckLogin(){         
	var taget_obj = document.getElementById('_userlogin');        
	myajax = new DedeAjax(taget_obj,false,false,'','','');         
	myajax.SendGet2("{wmd:global.cfg_basehost/}/member/ajax_loginsta.php");        
	DedeXHTTP = null;      
  }    
</script>