獲取單選按鈕的值

<div id="wrap">
    <input type="radio" name="payMethod" value="1" />支付寶
    <input type="radio" name="payMethod" value="2" />財務通
</div>

獲取一組單選按鈕對象：var obj_payPlatform = $('#wrap input[name="payMethod"]');

獲取被選中按鈕的值 ：var val_payPlatform = $('#wrap input[name="payMethod"]:checked ').val();

ps：加外層div是爲了減少整個頁面的檢索範圍