dedecms织梦会员登录二级域名跨域不能获取数据的解决办法

1DedeXHTTP = new XMLHttpRequest();

1DedeXHTTP.withCredentials = true;

1DedeXHTTP.open("POST", purl, true);

1DedeXHTTP.withCredentials = true;

1DedeXHTTP.open("GET", purl, true);

1DedeXHTTP.withCredentials = true;

1DedeXHTTP.open("GET", purl, false);

1DedeXHTTP.withCredentials = true;

1Header set Access-Control-Allow-Origin "*"

1add_header Access-Control-Allow-Origin *;

1Access-Control-Allow-Origin：*

1<script src="{dede:global.cfg_basehost/}/include/dedeajax2.js"></script>2<script type="text/javascript">     3function CheckLogin(){        4    var taget_obj = document.getElementById('_userlogin');       5    myajax = new DedeAjax(taget_obj,false,false,'','','');        6    myajax.SendGet2("{dede:global.cfg_basehost/}/member/ajax_loginsta.php");       7    DedeXHTTP = null;     8  }   9</script>