Ajax cross-domain access workarounds

Ajax cross-domain access
Cross-origin request blocked: Same-origin policy prevents read in http://zsh.cityhouse.cn/market/ajaxlogin.html?fromurl=http%3A%2F%2Fwwwt.cityhouse.cn% Remote resources for 2fdefault%2fforsalerank.html%3fmatchrand%3da0b92382. (Reason: CORS header is missing ' Access-control-allow-origin ').

A resource that accesses "http://www.a.com" from "http://www.b.com" appears as the above error prompt.

var loadurl = "http://www.a.com/market/ajaxlogin.html?";
Loadurl + = "fromurl=" +encodeuricomponent (LOCATION.HREF);
$ ('. Popcontent '). Load (Loadurl);

How can we solve this, thank you ~ ~ ~

------to solve the idea----------------------
Is there a setup access-control-allow-origin on the server?
Reference: http://blog.csdn.net/fdipzone/article/details/46390573
------to solve the idea----------------------
1. Add header header Access-control-allow-origin on server side;
2. Whether the method to be called by the server supports JSONP;
3. If not, honestly use curl on the server side to obtain data, Ajax rendering;

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