![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<!---->
<!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>单选按钮测试</title>
</head>
<body>
<input type="text" id="txtId" /><Br/>
<input type="radio" name="radId" value="c1001" />c1001 张三<Br />
<input type="radio" name="radId" value="c1002" />c1002 李四<Br />
<input type="button" value="选择" name="btnSelect" onclick="btnSelect_onclick()"/>
</body>
<script type="text/javascript">
setRadCheckedByName("radId"); //如果网页中单选框个数大于0,则设置第一个单选框为选中状态
function btnSelect_onclick()
{
var obj=document.getElementsByName('radId');
for(var i=0;i<obj.length;i++)
{
if(obj[i].checked)
{
document.getElementById("txtId").value=obj[i].value;
}
}
}
function setRadCheckedByName(radName)
{
var obj=document.getElementsByName(radName);
if(obj.length>0)
{
obj[0].checked=true;
}
}
</script>
</html>