DIV与JAVASCRIPT问题,请教
请教大家一个问题,只想隐藏DIV ID=a1、a2、a3等没有textarea的DIV,可是现在连div id=n1的也隐藏了啊。
<!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">  
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />  
<p> 
	</p>
<style type="text/css">
ul {width:100%;height:100%;list-style:none; padding:0px; margin:0px;}
li {float:left; height:60px;text-align:center;line-height:60px; padding-top:5px;}  
li.b {border-bottom:1px solid #000;border-right:1px solid #000; width:20%; }  
li.zhongjian {border-bottom:1px solid #000; width:59%;border-right:1px solid #000; text-align:left; padding-left:6px; }
li.you {
	border-bottom:1px solid #000;
	width:20%; margin-top:auto;
}  
li.b1 {border-right:1px solid #000; width:20%; }  
li.zhongjian1 {width:59%;border-right:1px solid #000; text-align:left; padding-left:6px; }
li.you1 {
	width:20%; margin-top:auto;
}  
td { font-size: 9pt}
.title { font-size: 10.5pt}
.iwhite {
	border-left: 1px solid rgb(255,255,255);
  	border-right: 1px solid rgb(255,255,255);  
	border-top: 1px solid rgb(255,255,255);
	border-bottom:1px solid rgb(0.0,255);  
	font-family: "Verdana", "Arial", "Helvetica", "sans-serif";  
	font-size: 9pt; color: #298583;background:#ffffff; font-weight: normal}
.igray {font-family: "宋体";
	font-size: 9pt;	
	color: #000000;	
	background:#ffffff;	
	font-weight: normal;
	border-bottom: 0px solid #D7E0EC;
	border-top: 0px solid #DADBE3;
	border-right: 0px solid #DADBE3;
	border-left: 0px solid #DADBE3;
	}
.igrby {font-family: "宋体";
	font-size: 9pt;	
	color: #000000;	
	background:#ffffff;	
	font-weight: normal;
	border-bottom: 0px solid #D7E0EC;
	border-top: 0px solid #DADBE3;
	border-right: 0px solid #DADBE3;
	border-left: 0px solid #DADBE3;
	}
.tabborder {
     border:1px solid #ffffff;
	}
.writetd {
     text-align:left;
	padding:6px;
	}
     </style>      
<table border="0" cellpadding="0" cellspacing="0" style="border-right-width: 0px; border-top-width: 0px; border-bottom-width: 0px; border-left-width: 0px" width="100%">
	<tbody>
		<tr>
			<td align="middle" height="42" style="border-right-width: 0px; border-top-width: 0px; border-bottom-width: 0px; border-left-width: 0px">
				<font size="+1"><strong>员工离职审批单</strong></font></td>
		</tr>
	</tbody>
</table>
<table align="center" border="1" bordercolor="#666666" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="95%">
	<tbody>
		<tr>
			<td bgcolor="#ffffff" colspan="2" style="text-align: center">
				公文标题</td>
			<td bgcolor="#ffffff" class="writetd" colspan="6">
				<input name="文件标题" size="40" /><span style="color: #8b4513">(例:生产部张三的离职申请)</span></td>
		</tr>
		<tr>
			<td class="writetd" style="text-align: center">
				姓名</td>
			<td class="writetd">
				 <input id="3698" name="姓名&q