Hier ist der aktualisierte Quellcode, aber ohne Erfolg.
<div>
<form enctype="multipart/form-data" action="http://www.weebly.com/weebly/apps/formSubmit.php" method="POST" id="form-127500378183686844">
<div id="127500378183686844-form-parent" class="wsite-form-container" style="margin-top:15px;">
<div class="formlist" id="127500378183686844-form-list">
<h2 class="wsite-content-title" style="text-align:left;">Kontakt</h2>
<div><div class="wsite-form-field wsite-name-field" style="margin:0px 0px 0px 0px;">
<label class="wsite-form-label" for="input-256819660389498080">Name <span class="form-required">*</span></label>
<div style="clear:both;"></div>
<div class="wsite-form-input-container wsite-form-left wsite-form-input-first-name">
<input id="input-256819660389498080" class="wsite-form-input wsite-input" type="text" name="_u256819660389498080[first]" />
<label class="wsite-form-sublabel" for="input-256819660389498080">First</label>
</div>
<div class="wsite-form-input-container wsite-form-right wsite-form-input-last-name">
<input id="input-256819660389498080-1" class="wsite-form-input wsite-input" type="text" name="_u256819660389498080[last]" />
<label class="wsite-form-sublabel" for="input-256819660389498080-1">Last</label>
</div>
<div id="instructions-256819660389498080" class="wsite-form-instructions" style="display:none;"></div>
</div>
<div style="clear:both;"></div></div>
<div><div class="wsite-form-field" style="margin:5px 0px 5px 0px;">
<label class="wsite-form-label" for="input-598307925891005002">E-Mail Adresse <span class="form-required">*</span></label>
<div class="wsite-form-input-container">
<input id="input-598307925891005002" class="wsite-form-input wsite-input wsite-input-width-200px" type="text" name="_u598307925891005002" />
</div>
<div id="instructions-598307925891005002" class="wsite-form-instructions" style="display:none;"></div>
</div></div>
<div><div class="wsite-form-field" style="margin:5px 0px 5px 0px;">
<label class="wsite-form-label" for="input-560392210716632875">Nachricht <span class="form-required">*</span></label>
<div class="wsite-form-input-container">
<textarea id="input-560392210716632875" class="wsite-form-input wsite-input wsite-input-width-285px" name="_u560392210716632875" style="height: 50px"></textarea>
</div>
<div id="instructions-560392210716632875" class="wsite-form-instructions" style="display:none;"></div>
</div></div>
</ul>
</div>
<div style="display:none; visibility:hidden;">
<input type="text" name="wsite_subject" />
</div>
<div style="text-align:left; margin-top:10px; margin-bottom:5px;">
<input type="hidden" name="form_version" value="2" />
<input type="hidden" name="wsite_approved" id="wsite-approved" value="approved" />
<input type="hidden" name="ucfid" value="127500378183686844" />
<button class='wsite-button'><span class='wsite-button-inner'>Senden</span></button>
</a>
</div>
</form>
</div>
</td>
</tr>
</tbody>
</table>
</div></div></div></div>
</div>
</div>
<div id="footer">
<div id="footer-content"></div>
</div>
</div>
</body>
</html>