css layout messed up in FireFox need help

below is my index.css file for my website


body
{
background-color: #F3F3F3;
color: #000;
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 11px;
margin: 2ex;
padding: 0px;
text-align: center;
}

a:link, a:visited
{
color: #336699;
text-decoration: none;
}

a:hover
{
color: #336699;
text-decoration: underline;
}

table, tr, td
{
color: #000;
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 11px;
}

.orta
{
padding: 10px;
border: 1px solid #5D789C;
background-color: #FFF;
}

.dis
{
width: 500px;
background-color: #ACBFD9;
border: 1px solid #5D789C;
padding: 8px;
}

.desctext
{
color: gray;
}

.tablerow1 img,
.tablerow2 img,
.tablerow3 img
{
vertical-align: middle;
border: 0px;
}

.tablerow1
{
background-color: #EAEDF0;
padding: 6px;
border-bottom: 1px solid #C1BEBE;
border-right: 1px solid #C1BEBE;
border-top: 1px solid #FFF;
border-left: 1px solid #FFF;
}

.TopNavy
{
background-color: #EEEEEE;
background-image: url('images/off-bg.jpg');
background-repeat: repeat-x;
color: #666666;
font-family: Trebuchet MS, Verdana, Tahoma, Arial, sans-serif;
font-size: 12px;
padding: 0px;
vertical-align: middle;
height: 21px;
border: 1px solid #FFFFFF;
font-weight: normal;
}

.TopNavy a:link, .TopNavy a:visited
{
font-family: Trebuchet MS, Verdana, Tahoma, Arial, sans-serif;
font-size: 11px;
color: #336699;
text-decoration: none;
}

.TopNavy a:hover
{
font-family: Trebuchet MS, Verdana, Tahoma, Arial, sans-serif;
font-size: 11px;
color: #FF0000;
text-decoration: underline;
}

.Menu_Norm
{
background-color: #EEEEEE;
background-image: url('images/off-bg.jpg');
background-repeat: repeat-x;
color: #888888;
font-family: Verdana, Tahoma, Arial, sans-serif;
font-size: 11px;
padding: 0px;
vertical-align: middle;
height: 21px;
border: 1px solid #FFFFFF;
cursor: hand;
font-weight: normal;
}

.Menu_Over
{
background-color: #EEEEEE;
background-image: url('images/on-bg.jpg');
background-repeat: repeat-x;
color: #666666;
font-family: Verdana, Tahoma, Arial, sans-serif;
font-size: 11px;
padding: 0px;
vertical-align: middle;
height: 21px;
border: 1px solid #FFFFFF;
cursor: hand;
font-weight: normal;
}

.tableheader
{
font-size: 11px;
vertical-align: middle;
font-weight: bold;
color: #FFF;
padding: 5px;
background-image: url('images/table_title_gradient.gif');
background-repeat: repeat-x;
background-color: #3363A1;
}

.tableheader a:link, .tableheader a:visited
{
color: #FFF;
text-decoration: underline;
}

.tableheader a:hover
{
color: #FFCC00;
text-decoration: none;
}

.tableborder
{
border: 1px solid #5D789C;
}

.tablerow1
{
background-color: #EAEDF0;
padding: 6px;
border-bottom: 1px solid #C1BEBE;
border-right: 1px solid #C1BEBE;
border-top: 1px solid #FFF;
border-left: 1px solid #FFF;
}

.tablerow2
{
background-color: #F1F1F1;
padding: 6px;
border-bottom: 1px solid #C1BEBE;
border-right: 1px solid #C1BEBE;
border-top: 1px solid #FFF;
border-left: 1px solid #FFF;
}

.tablerow3
{
background-color: #D1DCEB;
padding: 6px;
border-bottom: 1px solid #D1DCEB;
border-right: 1px solid #D1DCEB;
border-top: 1px solid #FFF;
border-left: 1px solid #FFF;
}

.tablerow4
{
background-color: #C0CBDA;
padding: 6px;
border-bottom: 1px solid #D1DCEB;
border-right: 1px solid #D1DCEB;
border-top: 1px solid #FFF;
border-left: 1px solid #FFF;
}

.main-area-for-section
{
background-color: #FFFFFF;
border: 1px solid #EEEEEE;
padding: 8px;
}

.text-input
{
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 10px;
width: 175px;
height: 14px;
padding: 0px;
}

.password-input
{
font-family: Tahoma, Verdana, Arial, sans-serif;
font-size: 12px;
width: 175px;
height: 14px;
padding: 0px;
color: #FF0000;
}

.submit-input
{
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 11px;
padding: 4px;
border: 1px;
background-color: transparent;
}

form
{
margin: 0px;
}

.text-input2
{
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 10px;
height: 14px;
padding: 0px;
vertical-align: middle;
}

.my-select
{
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 10px;
height: 14px;
padding: 0px;
vertical-align: middle;
}

.file-input
{
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 10px;
width: 235px;
height: 20px;
padding: 2px;
}

.text-area
{
font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Arial, Verdana, "Trebuchet MS";
font-size: 10px;
width: 300px;
height: 100px;
padding: 2px;
}

now below here is an image of what my site looks like in FireFox and Internet Explorer

http://www.fearfx.com/help.jpg

Thank you.

What about the HTML code?

<div class='tableborder'>
<div class="tableheader">
<span style="float: left;">
Event(s)<?php if ($_GET['message']) { echo ' - '.$_GET['message']; } ?>
</span>
<span style="float: right;">
<a href="index.php?act=event_manager&sa=new">Add New &raquo;</a>
</span>
</div>
<table width="100%" cellpadding="4" cellspacing="0">
<tr>
<td class="tablerow2" align="center" valign="middle" nowrap>
<b>#</b>
</td>
<td class="tablerow2" width="100%">
<b>Event Title</b> (Date) @ Location
</td>
<td class="tablerow2" align="center" valign="middle" nowrap>
<b>Delete</b>
</td>
<td class="tablerow2" align="center" valign="middle" nowrap>
<b>Edit</b>
</td>
</tr>
<?php
$alternate = true;
$i = 1;
while ($D = mysql_fetch_array($Q)) {
?>
<tr>
<td class="tablerow<?php if ($alternate) { echo '1'; } else { echo '2'; } ?>" align="center" valign="middle" nowrap>
<?php echo $i . '.'; ?>
</td>
<td class="tablerow<?php if ($alternate) { echo '1'; } else { echo '2'; } ?>" width="100%">
<?php echo stripslashes($D['title']) . ' (' . date('d.m.Y', $D['date']) . ' - ' . $D['time'] . ') @ ' . $D['location']; ?>
</td>
<td class="tablerow<?php if ($alternate) { echo '1'; } else { echo '2'; } ?>" align="center" valign="middle" nowrap>
<a href="index.php?act=event_manager&sa=delete&id=<?php echo $D['event_id']; ?>" onclick="return onay()"><img src="images/delete.png" alt="Sil" border="0" /></a>
</td>
<td class="tablerow<?php if ($alternate) { echo '1'; } else { echo '2'; } ?>" align="center" valign="middle" nowrap>
<a href="index.php?act=event_manager&sa=edit&id=<?php echo $D['event_id']; ?>"><img src="images/edit.png" alt="Düzenle" border="0" /></a>
</td>
</tr>
<?php
$alternate = !$alternate;
$i++;
}
?>
</table>
</div>

can anyone help with this problem?

Do you have a live version?