<input type="file" name="filedocument" id="selectFileOption" style="display: none" />
<div id="FileUpload" class="input-group file-upload">
    <input type="text" id="FileField" onClick="triggerClick('selectFileOption');" readonly />
    <div class="input-group-button">
        <label for="selectFileOption" class="button">Browse</label>
    </div>
</div>
<input type="submit" name="submitBtn" class="button" value="Upload" />