## 如图
## 代码
### HTML
```
<input type="radio" value="pay_code=alipay" name="pay_radio">alipay
<input type="radio" value="pay_code=weixin" name="pay_radio">wxPay
```
### JS
```
<script>
$(document).ready(function () {
$("input[name='pay_radio']").first().trigger('click');
});
</script>
```
