我想使用json获取api值。如果我单击json按钮我没有得到任何响应

I want to get the api values using json. if I click the json button I did not get any response I don't know why this is not running yesterday I have checked with api method it is in post only.I don't know where i am lacking. Here is my code:

<script type="text/javascript">
function json()
{
    xmlhttp= new XMLHttpRequest();
    var url="http://new.ezeeinfosolutions.com/busservices/auth/getAuthToken?namespaceCode=demo&username=ram@demo.com&password=newnew&devicemedium=WEB";
    alert(url);
    //var url="dbarr.php";
    xmlhttp.onreadystatechange=function()
    {
        if(xmlhttp.readyState==4 && xmlhttp.status==200)
        {
            var ret_arr=JSON.parse(xmlhttp.responseText);
            json_arr(ret_arr);
        }
    }
    xmlhttp.open("POST",url,true);
    xmlhttp.send();
}
function json_arr(x)
{
    var res="";
    var i;
    for(i=0;i<x.length;i++)
    {
        res+=x[i].name+" "+x[i].mobile+"</br>";
    }
    document.getElementById('print').innerHTML=res;
}
</script>

<form name="f1" action="" method="post">
<input type="submit" onClick="json();" value="Json">
<p id="print"></p>
</form>

i can suppose what "http://new.ezeeinfosolutions.com" isnt your domain and you nead create some php mirror file on your server.

This file will get response from http://new.ezeeinfosolutions.com and return json.

their can few possible solution, if any of them get you to success than chear up :)

try to set response type.
xmlhttp.responseType = 'json';
try to use xmlhttp.response instead of xmlhttp.responseText

use this example to compare.

var getJSON = function(url, successHandler, errorHandler) {
  var xhr = typeof XMLHttpRequest != 'undefined'
    ? new XMLHttpRequest()
    : new ActiveXObject('Microsoft.XMLHTTP');
  xhr.open('get', url, true);
  xhr.responseType = 'json';
  xhr.onreadystatechange = function() {
    var status;
    var data;
    // http://xhr.spec.whatwg.org/#dom-xmlhttprequest-readystate
    if (xhr.readyState == 4) { // `DONE`
      status = xhr.status;
      if (status == 200) {
        successHandler && successHandler(xhr.response);
      } else {
        errorHandler && errorHandler(status);
      }
    }
  };
  xhr.send();
};

getJSON('https://mathiasbynens.be/demo/ip', function(data) {
  alert('Your public IP address is: ' + data.ip);
}, function(status) {
  alert('Something went wrong.');
});