Javascript Form How to - Get onchange to trigger innerHTML update on file input

Question

We would like to know how to get onchange to trigger innerHTML update on file input.

Answer


<!DOCTYPE html>
<html>
<head>
</head><!--from  ww  w  .  j  av  a 2s .c  om-->
<body>
  <script type="text/javascript">
    function get_filename(obj,fileupid) {
        var file = obj.value;
        var disploc = fileupid;
        document.getElementById('current_file_' + disploc).innerHTML='Attached: ' + file;
    }
    </script>
  <input type="file" id="file-503"
    onchange="get_filename(this,'file-503');" />
  <span id="current_file_file-503">&nbsp;</span>
</body>
</html>

The code above is rendered as follows: