<div class="form-group">
<label for="">Change thumbnail</label>
<div class="input-group fileUpload">
<input type="text" class="fileUpload-text" readonly>
<label class="input-group-btn">
<span class="button buttonFile">
Browse… <input type="file" style="display: none;" multiple>
</span>
</label>
</div>
</div>