随便加个style试一试
<input type="radio" name="r2" style="visibility:visible" value="0" onClick="return chkonclick(setform)">
<input type="radio" name="r2" style="visibility:visible" value="0" onClick="return chkonclick(setform)">
调试欢乐多
<input type="radio" name="cr1" checked onclick="chk('r1','')">显示
<input type="radio" name="cr1" onclick="chk('r1','none')">隐藏<br>
<span id="r1">
------------------------------<br>
<input type="radio" name="x">选择1<br>
<input type="radio" name="x">选择2<br>
<input type="radio" name="x">选择3<br>
<input type="radio" name="x">选择4<br>
<input type="radio" name="x">选择5<br>
------------------------------
</span>
<script language="JavaScript">
function chk(id,sh){
eval(id).style.display = sh;
}
</script>