Sitede Yaptığım Taplo Mozillada Ortalanmıyor

<div id=\"kayan_reklam_sag\" >
<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"100%\" id=\"table1\" >
	<tr>
		<td>
				<center><table border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"900\" background=\"Resimler/turka/ustmenu.gif\" >
					<tr>
						<td align=\"center\" width=\"200\"><a href=\"index.php\"><img src=\"Resimler/turka/turkapay.gif\" ></a></td>
";

	$kisi=mysql_num_rows(mysql_query("SELECT * FROM ".$prefix."_istek WHERE eklenen='$uyeid'"));

			
						if($kullanici==""){
						echo"<td align=\"center\" width=\"550\"></td>";
						}else{
						echo"
						<td align=\"center\" width=\"34\" background=\"Resimler/turka/mesaj.gif\"><a href=\"Sayfa.php?Git=OzelMesajlar\" title=\"Mesajlar\"><font color=\"#FFFF00\" ><b>$toplamyenimesaj</b></font></a></td>
						<td align=\"center\" width=\"34\" background=\"Resimler/turka/kisi.gif\"><a href=\"Sayfa.php?Git=istek&Sayfa=goster\" title=\"Arkadaşlık İstekleri\"><font color=\"#FFFF00\" ><b>$kisi</b></font></a></td>
						<td align=\"center\" width=\"34\" background=\"Resimler/turka/bildirim.gif\"><font color=\"#FFFF00\" ><b>$kisi</b></font></td>
						<td align=\"center\" width=\"270\">
		<form action=\"Sayfa.php?Git=Arama\" method=\"post\" height=\"25\">
		<table border=\"0\" width=\"100%\"  id=\"table6\" cellspacing=\"0\" cellpadding=\"0\">
			<tr>
				<td align=\"center\">
				<input type=\"text\" name=\"arama\" size=\"30\" value=\"Kullanıcı Ara\" style=\"font-weight: 700; height:22\" onfocus=\"if(this.beenchanged!=true){ this.value = ''}\" onblur=\"if(this.beenchanged!=true) { this.value='Kullanıcı Ara' }\" onchange=\"this.beenchanged = true;\" ></td>
				<td width=\"24\" align=\"center\">
				<input border=\"0\" src=\"Resimler/turka/arama.gif\" value=\"Ara\"  type=\"submit\"></td>
			</tr>
		</table>
		</form>
		</td>
		<td align=\"center\" width=\"250\"></td>
					<td align=\"center\" width=\"35\"><div id=\"responsecontainer\"></div>
					<a onclick=\"MM_showHideLayers('sohbet2','','show')\"  href=\"#\" title=\"Sohbet\"><img src=\"Resimler/turka/sohbet.gif\"></a>
					<div id=\"sohbet2\">
<table border=\"0\" width=\"200\" height=\"250\" id=\"table1\" cellspacing=\"0\" cellpadding=\"0\" bgcolor=\"#DDECFE\">
	<tr>
		<td height=\"250\" valign=\"top\"><iframe name=\"iframe\" src=\"Sayfa.php?Git=Sohbet\" 
		width=\"200\" height=\"250\" marginwidth=\"1\" marginheight=\"1\" scrolling=\"no\" align=\"absmiddle\" border=\"0\" frameborder=\"0\">
		</iframe>
</td>
	</tr>

	<tr>
		<td><a onclick=\"MM_showHideLayers('sohbet2','','hide')\"  href=\"#\" title=\"Sohbet\"><img src=\"Resimler/turka/kap.gif\"></a>
</td>
	</tr>
</table></div>
					
";
						}
	echo"</td>

					</tr>
				</table></center></td></tr>
</table></div>