<input type=radio name=1><input type=radio name=1>
<input type=radio name=1><input type=radio name=1>
<br>
<input type=radio name=2><input type=radio name=2>
<input type=radio name=2><input type=radio name=2>
<br><input type=button value=check onclick="cc()">
<script language=javascript>
function cc(){
var aa = document.getElementsByTagName("input");
for (var i = 0; i<aa.length;i++){
if (aa[i].type=="radio" && aa[i].checked){
alert("有被选中的项!");return;}
}
alert("一项都没有被选中!");
}
</script>
<input type=radio name=1><input type=radio name=1>
<br>
<input type=radio name=2><input type=radio name=2>
<input type=radio name=2><input type=radio name=2>
<br><input type=button value=check onclick="cc()">
<script language=javascript>
function cc(){
var aa = document.getElementsByTagName("input");
for (var i = 0; i<aa.length;i++){
if (aa[i].type=="radio" && aa[i].checked){
alert("有被选中的项!");return;}
}
alert("一项都没有被选中!");
}
</script>
{
var mRadio=document.all(mRadio);
for(j=0;j<mRadio.length;j++)
{
if(mRadio[j].checked==true)return false;
} alert("还有选项未选上");
mRadio[0].focus();
return true;}//mRadio为Radio的名字