更新字段异常

<?php<br />	if(@$_REQUEST["top"]!=""){<br />		$top=@$_REQUEST["top"];<br />		if(is_numeric($top)){<br />			<br />			<span style="color: #FF0000;">$sqlcp="update info set top=".$top." where id=".$_REQUEST["id"];</span>			<span style="color: #FF0000;">$conn->Execute($sqlcp);</span><br />		}else{<br />			showmsg("字符不正确！只能输入数字!!","list_px.php?wz=".@$_REQUEST["wz"]."&page=".@$_REQUEST["page"]."");<br />		}<br />	}<br />?><br /><form name="form" method="post" action="?wz=<?php echo @$_REQUEST["wz"];?>&page=<?php echo @$_REQUEST["page"];?>">  <br />  <tr  bgcolor="<?php echo $bgc;?>" onMouseOut="this.className=''" onMouseOver="this.className='list-bg'"><br />    <td class="list1 pl8"> <a href="List_Edit.asp?checkbox=<?php $rf=$rs->fields("id");<br />	 echo $rf->value;<br />	?>&wz=<?php echo urlencode($wz);?>"><?php $rf=$rs->fields("title");echo $rf->value;?><?php $rf=$rs->fields("pic");if($rf->value!="") echo "<a href='../../upload3/".$rs["pic"]."'  target='_blank'><img src='../images/pic.gif'  border=0   alt='查看图片'/></a>";?></td><br /><br />	<br />    <td align="center" class="list1"><br />	<span   style="max-width:90%"><input name="top" class="listform" id="top" onBlur="javascript:this.form.submit();"  onClick="this.className='listform1'" value="<?php $rf=$rs->fields("top"); echo $rf->value;?>" maxlength="5" /><br />    <input type="hidden" name="id" value="<?php $rf=$rs->fields("id"); echo $rf->value;?>">	</td></span>	<br />	<br />	<br />    <td align="center" class="list1"><?php $rf=$rs->fields("hit"); echo $rf->value;?></td><br />    <td align="center" class="list1"><?php $rf=$rs->fields("wz"); echo $rf->value;?></td><br />    <td align="center" class="list1 pl8"><?php $rf=$rs->fields("postdate"); echo $rf->value;?></td><br />    </tr></form><br />