<input type="radio" name="radio1" value="">
<input type="radio" name="radio2" value="r2">
<script language="JavaScript">
<!--
var obj = document.getElementsByTagName("input");
for(var i=0; i<obj.length; i++)
{
if(obj[i].value == "")
alert("input[" +i+ "]: blank");
}
//-->
</script>
<input type="radio" name="radio2" value="r2">
<script language="JavaScript">
<!--
var obj = document.getElementsByTagName("input");
for(var i=0; i<obj.length; i++)
{
if(obj[i].value == "")
alert("input[" +i+ "]: blank");
}
//-->
</script>
<input type="radio" name="radio1" value="2">我如何获取被选择的 radio1 的 value 是什么呢?
我 alert(radio1.value);
结果是 undefined