JavaScript 获取选中的radio的值

HTML

<p>支付宝</p><input type="radio" name="paytype" value="aliapy"><p>微信支付</p><input type="radio" name="paytype" value="wxpay"><button type="button" onclick="pay()">确认支付</button>

JS

<script>function pay(){console.log(get_radio("paytype"));}function get_radio(obj_name){var obj = document.getElementsByName(obj_name);for(i=0;i<obj_name.length;i++){if(obj[i].checked){return obj[i].value;}}}</script>