Arkadaşlar bi zahmet şu kodda hatalı yer neresi:
(Not: Sayfadaki gereksiz yerleri sildim o yüzden iç içe gereksiz "table"lar açılmış gibi gözüküyor.)

Kod:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9" />
<script src="jquery.js" type="application/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
$("#btn_uyegiris").click(function() {
$('div.kutu_uyegiris').slideToggle('fast'); return false;
});
});
</script>
</head>
<body>
<table width="840" border="0" align="center" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td><table width="100%" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="2" valign="top"><table width="780" border="0" cellspacing="0" cellpadding="5">
<tbody>
<tr>
<td width="50%" valign="top"> <table width="100%" border="0" cellspacing="0" cellpadding="0">
<tbody><tr>
<td class="baslik_mavi">Siz de Üye Olun!</td>
</tr>
<tr>
<td class="normalyazi"><p>Siz de mi sağlık sektöründe çalışıyorsunuz?<br />
Peki size ait bir web sitesi ister misiniz?<br />
Üstelik tamamen ücretsiz... </p>
<p align="right"><a href="XX" class="kutulink">Hemen Üye OL ></a></p>
<p align="right"><a id="btn_uyegiris" href="javascript:void(0)" class="kutulinkKucuk">Üye Girişi ></a>
<div class="kutu_uyegiris" style="display:none; margin-top:-6px"><form action="XXXXXXXXX" method="post" name="form" id="form3" style="margin:0px">
<table width="100%" border="0" cellpadding="5" class="kutusekme">
<tbody>
<tr>
<td width="100" align="right" nowrap="nowrap" class="form_caption">E-Mail Adresiniz :</td>
<td><input name="uyegiris_email" type="text" class="form_textbox_normal" id="uyegiris_email" value="" /> </td>
<td rowspan="2" valign="bottom"><input name="button" type="submit" class="form_btn" id="button" value="Tamam" /></td>
</tr>
<tr>
<td align="right" class="form_caption">Şifreniz :</td>
<td><input name="uyegiris_sifre" type="password" class="form_textbox_normal" id="uyegiris_sifre" /></td>
</tr>
</tbody>
</table>
</form>
</div></p></td>
</tr></tbody>
</table>
<br />
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tbody><tr>
<td class="baslik_mavi">Üyelerimiz</td>
</tr>
<tr>
<td width="150"> </td>
</tr></tbody>
</table> </td>
</tr></tbody>
</table></td>
</tr></tbody>
</table></td>
</tr></tbody>
</table>
</body>
</html>
