javascript - POST array not receiving xhr data with JSON type -

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i'm bit puzzled this. want hands via xhr, on client side, on contents of json file server , can't seem manage that.

no jquery, plain xmlhttprequest.

function getjson(user, value) {   params = "user=" + user + "&value=" + value;   request = new ajaxrequest(); //wrapper around xmlhttprequest   request.open("post", "checksj.php", true);     request.setrequestheader("content-type", "application/json");   request.setrequestheader("content-length", params.length);   request.setrequestheader("connection", "close");   request.onload = function() {   var status = request.status;   if (this.readystate == 4)         if (this.status == 200)             if (this.responsetext != null)                 o('contents').innerhtml = this.responsetext;  }  request.send(params); }

when print_r contents of $_post array empty array although when check out source in firebug parameters values being sent.

any idea on why not working? i'd content working example accomplishes task.

put

request.setrequestheader("content-type","application/x-www-form-urlencoded");

remove

request.setrequestheader("content-length", params.length); request.setrequestheader("content-type", "application/json");

as not sending json, content-length not needed.


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