改好了
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
<script langauge="javaScript" type="text/javascript">
function showDiv(i)
{
for(j=0;j<=6;j++)
{
document.getElementById('div'+j).style.display='none';
}
document.getElementById('div'+i).style.display='block';
}
</script>
</head>
<body ><form>
<table width="700" border="1" cellspacing="0" cellpadding="0">
<tr>
<td colspan="2"> </td>
</tr>
<tr>
<td width="169" height="283"><table width="100%" border="1" cellspacing="0" cellpadding="0">
<tr>
<td height="30"><div align="center"><input type=button value="showDiv0" onclick="showDiv(0);">
会员管理</div>
</td>
</tr>
<tr>
<td height="30"><input type=button value="showDiv1" onclick="showDiv(1);"></td>
</tr>
<tr>
<td height="30"><input type=button value="showDiv2" onclick="showDiv(2);"></td>
</tr>
<tr>
<td height="30"><input type=button value="showDiv3" onclick="showDiv(3);"></td>
</tr>
<tr>
<td height="30"><input type=button value="showDiv4" onclick="showDiv(4);"></td>
</tr>
<tr>
<td height="30"><input type=button value="showDiv5" onclick="showDiv(5);"></td>
</tr>
<tr>
<td height="30"><input type=button value="showDiv6" onclick="showDiv(6);"></td>
</tr>
</table></td>
<td width="525">
<div id=div0 >ggggg</div>
<div id=div1 >ggggg</div>
<div id=div2 >bbbbb</div>
<div id=div3 >ccccc</div>
<div id=div4 >ddddd</div>
<div id=div5 >eeeee</div>
<div id=div6 >fffff</div>
</td>
</tr>
</table>
</form>
</body>
</html>