Me.txtSYONIN_BI_S.Attributes.Add("onfocus", "this.select(); GetFocusId('SYONIN_BI_S'); return false;")
以上是一个txtBox控件，通过JavaScript在这个控件获得焦点的事件中，具体定义处理的内容（GetFocusId方法）。
现在想问的是：
如果是CheckBox控件或者RadioButton控件，有没有获得焦点的事件，有的话是什么？
我试过写Me.rdb_1.Attributes.Add("onfocus", "this.select(); GetFocusId('SYONIN_BI_S'); return false;")不管用。也就是说RadioButton或者CheckBox里面，没有onfocus事件？正确的该怎样写？
谢谢！
<html>
<head>
<script language="javascript">
[code=JScript]function focusRadAndCbo()
{
document.getElementById("rdId2").checked = true;
document.getElementById("rdId2").focus(); document.getElementById("ckId3").checked = true;
document.getElementById("ckId3").focus();
}
</script>
</head>
<body onload="focusRadAndCbo()">
<form>
<input type="radio" name="rad" id="rdId1">1
<input type="radio" name="rad" id="rdId2">2
<input type="radio" name="rad" id="rdId3">3 <br><br> <input type="checkbox" name="cbo" id="ckId1">1
<input type="checkbox" name="cbo" id="ckId2">2
<input type="checkbox" name="cbo" id="ckId3">3
</form>
</body>
</html>
[/code]
<html>
<head>
<script language="javascript">function focusRadAndCbo()
{
document.getElementById("rdId2").checked = true;
document.getElementById("rdId2").focus(); document.getElementById("ckId3").checked = true;
document.getElementById("ckId3").focus();
}</script>
</head>
<body onload="focusRadAndCbo()">
<form>
<input type="radio" name="rad" id="rdId1" onfocus="alert(this.name+':'+this.id)">1
<input type="radio" name="rad" id="rdId2">2
<input type="radio" name="rad" id="rdId3" onfocus="alert(this.name+':'+this.id)">3 <br><br> <input type="checkbox" name="cbo" id="ckId1" onfocus="alert(this.name+':'+this.id)">1
<input type="checkbox" name="cbo" id="ckId2" onfocus="alert(this.name+':'+this.id)">2
<input type="checkbox" name="cbo" id="ckId3">3
</form>
</body>
</html>