html - Value of list populated with javascript -

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how populate select list values got javascript?

i sending request .php site gives me respond in json format. want put lines got select list.

<select id = "list" name=log size=50 style=width:1028px>  <script type="text/javascript"> window.onload = function () {    var bytes=0;   var url = "/test/log.php?q='0'";   function httpget(url)   {     var xhttp = new xmlhttprequest();     var realurl = url + bytes;     xhttp.open("get", url, true);     xhttp.onload = function (e) {         if (xhttp.readystate === 4) {             if (xhttp.status === 200) {                 console.log(xhttp.responsetext);                 var response=json.parse(xhttp.responsetext);                 var log = response.key;                 bytes = log.length;             }         };     xhttp.onerror = function (e) {         console.error(xhttp.statustext);       }     };       xhttp.send();   }    var updateinterval = 2000;    function update() {      httpget(url);       settimeout(update, updateinterval);   }    update(); } </script> </select>

the response log.php "{"key":"whole log file"}". want store reponse list , populate every 2 seconds.

loop on contents of returned string after json.parse-ing it. create option elements it, , insert select.

 var html = "";  var obj = json.parse(xhttp.responsetext);  for(var key in obj) {    html += "<option value=" + key  + ">" +obj[key] + "</option>";  }  document.getelementbyid("list").innerhtml = html;

see jsbin


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