修改一下<script language="javascript">
<!--
function controlbb(){
if (document.all.aa[0].checked)
document.all.bb.style.display = "";
else
document.all.bb.style.display="none";
}//-->
</script>
</HEAD><BODY onload="controlbb()">
<form action="bb.html">
<table width="100%" border="0">
<tr>
<td>请选择:</td>
<td>
<input type="radio" name="aa" value="0" onclick="controlbb()" checked>显示bb
<input type="radio" name="aa" value="1" onclick="controlbb()">隐藏bb
</td>
<!--
function controlbb(){
if (document.all.aa[0].checked)
document.all.bb.style.display = "";
else
document.all.bb.style.display="none";
}//-->
</script>
</HEAD><BODY onload="controlbb()">
<form action="bb.html">
<table width="100%" border="0">
<tr>
<td>请选择:</td>
<td>
<input type="radio" name="aa" value="0" onclick="controlbb()" checked>显示bb
<input type="radio" name="aa" value="1" onclick="controlbb()">隐藏bb
</td>
<HEAD>
<TITLE> New Document </TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312"><script language="javascript">
<!--
function viewbb(){
document.all.bb.style.display = "";
}function hidebb(){
document.all.bb.style.display = "none";
}
function l(){
if(frmtest.aa[0].checked) viewbb(); else hidebb();
}
//-->
</script>
</HEAD><BODY onload="l();">
<form action="bb.html" name="frmtest">
<table width="100%" border="0">
<tr>
<td>请选择:</td>
<td>
<input type="radio" name="aa" value="0" onclick="viewbb()" checked>显示bb
<input type="radio" name="aa" value="1" onclick="hidebb()">隐藏bb
</td>
</tr>
<tr id="bb">
<td>bb</td>
<td>我就是BB</td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="OK"></td>
</tr></table>
</form>
</BODY>
</HTML>