<img id="preview" src="placeholder.png" height="100px" width="100px" />
<input type="file" name="image" onchange="previewImage(this)" accept="image/*"/>
<script type="text/javascript">
  function previewImage(input) {
    var preview = document.getElementById('preview');
    if (input.files && input.files[0]) {
      var reader = new FileReader();
      reader.onload = function (e) {
        preview.setAttribute('src', e.target.result);
      }
      reader.readAsDataURL(input.files[0]);
    } else {
      preview.setAttribute('src', 'placeholder.png');
    }
  }
</script>

<input type="file" accept="image/*"  onchange="showMyImage(this)" />
 <br/>
<img id="thumbnil" style="width:20%; margin-top:10px;"  src="" alt="image"/>

function showMyImage(fileInput) {
        var files = fileInput.files;
        for (var i = 0; i < files.length; i++) {
            var file = files[i];
            var imageType = /image.*/;
            if (!file.type.match(imageType)) {
                continue;
            }
            var img=document.getElementById("thumbnil");
            img.file = file;
            var reader = new FileReader();
            reader.onload = (function(aImg) {
                return function(e) {
                    aImg.src = e.target.result;
                };
            })(img);
            reader.readAsDataURL(file);
        }
    }