javascript代码在ie8里报错 document.getElementById(..

运行环境： 
<input type='text' name='os' value='Windows平台' style='width:100px' />

<input name="ostmp" type="radio" value="" onclick="osdo('')" />清空 
<input name="ostmp" type="radio" value="Windows平台" onclick="osdo('Windows平台')" /> 
Windows平台 <input name="ostmp" type="radio" value="" onclick="osdo('S60v2')" />S60v2 
<input name="ostmp" type="radio" value="" onclick="osdo('S60v3')" />S60v3 
<input name="ostmp" type="radio" value="" onclick="osdo('CHM')" />CHM 
<input name="ostmp" type="radio" value="" onclick="osdo('PDF')" />PDF 
<input name="ostmp" type="radio" value="" onclick="osdo('PPT')" />PPT 
<input name="ostmp" type="radio" value="" onclick="osdo('DOC')" />WORD 
<input name="ostmp" type="radio" value="" onclick="osdo('EXCEL')" />EXCEL
 
<input name="ostmp" type="radio" value="" onclick="osdo('asp')" />asp 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+access')" />asp+access 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+sqlserver')" />asp+sqlserver 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+sql/access')" /> 
asp+sql/access <strong>php源码</strong> 
<input name="ostmp" type="radio" value="" onclick="osdo('php')" />php 
<input name="ostmp" type="radio" value="" onclick="osdo('php+mysql')" /> 
php+mysql<input name="ostmp" type="radio" value="" onclick="osdo('jsp')" />jsp <strong>asp.net源码</strong> 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net')" />asp.net 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+access')" />asp.net+access 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+sql')" />asp.net+sql 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+sql/access')" />asp.net+sql/access

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
运行环境： 
<input type='text' name='os' value='Windows平台' style='width:100px' />

<input name="ostmp" type="radio" value="" onclick="osdo('')" />清空 
<input name="ostmp" type="radio" value="Windows平台" onclick="osdo('Windows平台')" /> 
Windows平台 <input name="ostmp" type="radio" value="" onclick="osdo('S60v2')" />S60v2 
<input name="ostmp" type="radio" value="" onclick="osdo('S60v3')" />S60v3 
<input name="ostmp" type="radio" value="" onclick="osdo('CHM')" />CHM 
<input name="ostmp" type="radio" value="" onclick="osdo('PDF')" />PDF 
<input name="ostmp" type="radio" value="" onclick="osdo('PPT')" />PPT 
<input name="ostmp" type="radio" value="" onclick="osdo('DOC')" />WORD 
<input name="ostmp" type="radio" value="" onclick="osdo('EXCEL')" />EXCEL
 
<input name="ostmp" type="radio" value="" onclick="osdo('asp')" />asp 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+access')" />asp+access 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+sqlserver')" />asp+sqlserver 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+sql/access')" /> 
asp+sql/access <strong>php源码</strong> 
<input name="ostmp" type="radio" value="" onclick="osdo('php')" />php 
<input name="ostmp" type="radio" value="" onclick="osdo('php+mysql')" /> 
php+mysql<input name="ostmp" type="radio" value="" onclick="osdo('jsp')" />jsp <strong>asp.net源码</strong> 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net')" />asp.net 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+access')" />asp.net+access 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+sql')" />asp.net+sql 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+sql/access')" />asp.net+sql/access

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<input name="ostmp" type="radio" value="" onclick="osdo('')" />清空 
<input name="ostmp" type="radio" value="Windows平台" onclick="osdo('Windows平台')" /> 
Windows平台 <input name="ostmp" type="radio" value="" onclick="osdo('S60v2')" />S60v2 
<input name="ostmp" type="radio" value="" onclick="osdo('S60v3')" />S60v3 
<input name="ostmp" type="radio" value="" onclick="osdo('CHM')" />CHM 
<input name="ostmp" type="radio" value="" onclick="osdo('PDF')" />PDF 
<input name="ostmp" type="radio" value="" onclick="osdo('PPT')" />PPT 
<input name="ostmp" type="radio" value="" onclick="osdo('DOC')" />WORD 
<input name="ostmp" type="radio" value="" onclick="osdo('EXCEL')" />EXCEL
 
<input name="ostmp" type="radio" value="" onclick="osdo('asp')" />asp 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+access')" />asp+access 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+sqlserver')" />asp+sqlserver 
<input name="ostmp" type="radio" value="" onclick="osdo('asp+sql/access')" /> 
asp+sql/access <strong>php源码</strong> 
<input name="ostmp" type="radio" value="" onclick="osdo('php')" />php 
<input name="ostmp" type="radio" value="" onclick="osdo('php+mysql')" /> 
php+mysql<input name="ostmp" type="radio" value="" onclick="osdo('jsp')" />jsp <strong>asp.net源码</strong> 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net')" />asp.net 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+access')" />asp.net+access 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+sql')" />asp.net+sql 
<input name="ostmp" type="radio" value="" onclick="osdo('asp.net+sql/access')" />asp.net+sql/access

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]