js 获取radio按钮值的实例

时间:2020-05-13 人气:0

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>js 获取radio按钮值的实例</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<p>
    <label>
      <input type="radio" name="RadioGroup1" value="单选" id="RadioGroup1_0" />
      单选</label>
    <br />
    <label>
      <input type="radio" name="RadioGroup1" value="单选" id="RadioGroup1_1" />
      单选</label>
    <br />
    <label>
      <input name="RadioGroup1" type="radio" id="RadioGroup1_2" value="单选" />
      单选</label>
    <br />
    <label>
      <input type="radio" name="RadioGroup1" value="单选" id="RadioGroup1_3" />
      单选</label>
    <input type="submit" name="button" id="button" value="提交" onclick="javascript:return checksubmit()" />
    <br />
</p>
</form>
<script>
function checksubmit()
{
if( GetRadioValue('RadioGroup1') )
{
  alert('有选');
}
else
{
  alert('没选');
}
}
function GetRadioValue(RadioName){
    var obj;
    obj=document.getElementsByName(RadioName);
    if(obj!=null){
        var i;
        for(i=0;i<obj.length;i++){
            if(obj[i].checked){
                return obj[i].value;
            }
        }
    }
    return null;
}
</script>
</body>
</html>

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