这是我写的.但是在打开页面时点"管理功能"不关闭"常用功能",
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<script language="javascript">
var tt='start';
var ii='start';
function turnit(aa,bb)
{
if (aa.style.display=="none")
{
if(tt!='start') tt.style.display="none";
if(ii!='start') ii.src="dian.gif";
aa.style.display=""
tt=aa;
ii=bb;
bb.src="ball.gif";
}
else
{
aa.style.display="none";
bb.src="dian.gif";
}
}
</script>
</head>
<body>
<div align="center" >
<table width="137" border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="b1" width="137" align="center" nowrap class=left_4_r ><a href="javascript:" language="JavaScript" onclick="turnit(a1,b1);"><font size="4">常用功能</font></a></td>
</tr>
<tr>
<td id="a1" style="display:'';">
<table width="118" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="18" align="center" ><font size="2"><a href="">发信箱</a></font></td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">收信箱</a></font> </td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">群 发</a></font></td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">通讯录</a></font></td>
</tr> </table>
</td>
</tr>
</table>
<table width="137" border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="b2" class=left_4_r align="center" nowrap><a href="javascript:" language="JavaScript" onclick="turnit(a2,b2);"><font size="4">管理功能</font></a></td>
</tr>
<tr>
<td id="a2" style="display:'none';">
<table width="118" height="91" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b1</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b2</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b3</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b4</a></font></td>
</tr>
</table>
</td>
</tr>
</table>
</div>
</body>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<script language="javascript">
var tt='start';
var ii='start';
function turnit(aa,bb)
{
if (aa.style.display=="none")
{
if(tt!='start') tt.style.display="none";
if(ii!='start') ii.src="dian.gif";
aa.style.display=""
tt=aa;
ii=bb;
bb.src="ball.gif";
}
else
{
aa.style.display="none";
bb.src="dian.gif";
}
}
</script>
</head>
<body>
<div align="center" >
<table width="137" border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="b1" width="137" align="center" nowrap class=left_4_r ><a href="javascript:" language="JavaScript" onclick="turnit(a1,b1);"><font size="4">常用功能</font></a></td>
</tr>
<tr>
<td id="a1" style="display:'';">
<table width="118" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="18" align="center" ><font size="2"><a href="">发信箱</a></font></td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">收信箱</a></font> </td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">群 发</a></font></td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">通讯录</a></font></td>
</tr> </table>
</td>
</tr>
</table>
<table width="137" border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="b2" class=left_4_r align="center" nowrap><a href="javascript:" language="JavaScript" onclick="turnit(a2,b2);"><font size="4">管理功能</font></a></td>
</tr>
<tr>
<td id="a2" style="display:'none';">
<table width="118" height="91" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b1</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b2</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b3</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b4</a></font></td>
</tr>
</table>
</td>
</tr>
</table>
</div>
</body>
</html>
意思大概明白.但是不知道怎么写.能不能帮我写个.谢谢拉!
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<script language="javascript">
var tt='start';
var ii='start';
function turnit(aa,bb)
{
if (aa.style.display=="none")
{
if(tt!='start') tt.style.display="none";
if(ii!='start') ii.src="dian.gif";
aa.style.display="block"
tt=aa;
ii=bb;
bb.src="ball.gif";
if(document.all['a1']==aa)
document.all['a2'].style.display='none';
else
document.all['a1'].style.display='none';
}
else
{
aa.style.display="none";
bb.src="dian.gif";
if(document.all['a1']==aa)
document.all['a2'].style.display='block';
else
document.all['a1'].style.display='block';
}
}
</script>
</head>
<body>
<div align="center" >
<table width="137" border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="b1" width="137" align="center" nowrap class=left_4_r ><a href="javascript:" language="JavaScript" onclick="turnit(a1,b1);"><font size="4">常用功能</font></a></td>
</tr>
<tr>
<td id="a1" style="display:'block';">
<table width="118" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="18" align="center" ><font size="2"><a href="">发信箱</a></font></td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">收信箱</a></font> </td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">群 发</a></font></td>
</tr>
<td height="18" align="center" ><font size="2"><a href="">通讯录</a></font></td>
</tr> </table>
</td>
</tr>
</table>
<table width="137" border="0" cellpadding="0" cellspacing="0">
<tr>
<td id="b2" class=left_4_r align="center" nowrap><a href="javascript:" language="JavaScript" onclick="turnit(a2,b2);"><font size="4">管理功能</font></a></td>
</tr>
<tr>
<td id="a2" style="display:'none';">
<table width="118" height="91" border="0" cellpadding="0" cellspacing="0">
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b1</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b2</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b3</a></font></td>
</tr>
<tr>
<td height="18" align="center" nowrap><font size="2"><a href="">b4</a></font></td>
</tr>
</table>
</td>
</tr>
</table>
</div>
</body>
</html>
<td id="a1" style="display:'none';">