选中单选按钮时动态出现相应内容

<TR>
<TD class=text height=35> <DIV align=right><STRONG>反馈的意见类型</STRONG>：</DIV></TD>
<TD class=normal height=30><INPUT CHECKED name=fbfor
onclick="javascript:document.getElementById('passcell').style.display='none'"
type=radio value=咨询相关服务>
咨询相关服务
<INPUT name=fbfor
onclick="javascript:document.getElementById('passcell').style.display='none'"
type=radio value=提出工作建议>
提出工作建议
<INPUT name=fbfor
onclick="javascript:document.getElementById('passcell').style.display='inline'"
type=radio value=咨询技术问题>
咨询技术问题
<INPUT name=fbfor
onclick="javascript:document.getElementById('passcell').style.display='none'"
type=radio value=其他>
其他</TD>
</TR>
<TR id=passcell style="DISPLAY: none">
<TD class=text colSpan=2 height=30> <TABLE border=0 cellPadding=0 cellSpacing=0 width="100%">
<TBODY>
<TR bgColor=#ffffff class=text>
<TD align=right class=text height=35
width="24%"><STRONG>软件版本号</STRONG>：</TD>
<TD class=normal height=30 width="76%"><INPUT class=text
name=version style="WIDTH: 240px"> </TD>
</TR>
<TR bgColor=#ffffff class=text>
<TD align=right class=text
height=35><STRONG>您的操作系统</STRONG>：</TD>
<TD class=normal height=30><SELECT class=text name=os
style="WIDTH: 240px">
<OPTION selected
value=win98>win98</OPTION>
<OPTION
value=win97>win97</OPTION>
<OPTION
value=win95>win95</OPTION>
<OPTION value="win nt">win nt</OPTION>
<OPTION value="win 2000">win 2000</OPTION>
<OPTION value="win xp">win xp</OPTION>
</SELECT> </TD>
</TR>
<TR bgColor=#ffffff class=text>
<TD align=right class=text
height=35><STRONG>浏览器种类</STRONG>：</TD>
<TD class=normal height=30><SELECT class=text
name=browser style="WIDTH: 240px">
<OPTION selected
value="Internet Explorer 6.x">Internet Explorer 6.x</OPTION>
<OPTION
value="Internet Explorer 5.x">Internet Explorer 5.x</OPTION>
<OPTION
value="Internet Explorer 4.x">Internet Explorer 4.x</OPTION>
<OPTION
value="Internet Explorer 3.x">Internet Explorer 3.x</OPTION>
<OPTION value="Netscape 5.x">Netscape 5.x</OPTION>
<OPTION value="NetScape 4.x">NetScape 4.x</OPTION>
<OPTION value="NetScape 3.x">NetScape 3.x</OPTION>
<OPTION value=Opera>Opera</OPTION>
<OPTION value=其他>其他</OPTION>
</SELECT> </TD>
</TR>
</TBODY>
</TABLE></TD>
</TR>