jquery - How can i change image after get data from database -

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for function getdatafromdb() newest data database , want use val["id"]to define condition change image see on function getimage it's not success. can give me example ?

<script>  function getdatafromdb() {     $.ajax({                  url: "getdata.php" ,                 type: "post",                 data: ''             })             .success(function(result) {                  var obj = jquery.parsejson(result);                     if(obj != '')                     {                           //$("#mytable tbody tr:not(:first-child)").remove();                           $("#mybody").empty();                           $.each(obj, function(key, val) {                                     var tr = "<tr>";                                     tr = tr + "<td>" + val["id"] + "</td>";                                     tr = tr + "<td>" + val["first_name"] + "</td>";                                     tr = tr + "<td>" + val["last_name"] + "</td>";                                     tr = tr + "<td>" + val["age"] + "</td>";                                     tr = tr + "<td>" + val["hometown"] + "</td>";                                     tr = tr + "<td>" + val["job"] + "</td>";                                     // tr = tr + "<td>" + "<img src='" + getimage(parseint(val["id"]))+"'>" + "</td>";                                     tr = tr + "</tr>";                                      $('#mytable > tbody:last').append(tr);                           });                     }              });  }  function getimage(id){     var image = document.getelementbyid("myimage");     if (image.val["id"] < 10){         return "pic/img1.jpg"     } else if (image.val["id"] < 20){         return "pic/img2.jpg"     } else {         return "pic/img3.jpg"     }; }  setinterval(getdatafromdb, 100);   // 1000 = 1 second </script>

uncomment commented tr in each loop , use following function

function getimage(id){      if (id< 10){         return "pic/img1.jpg"     } else if (id< 20){         return "pic/img2.jpg"     } else {         return "pic/img3.jpg"     }; }

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