jQuery中选定单选按钮的数量
问题描述：
假设我有如下几组单选按钮:
suppose I have groups of radio buttons like so:
<label><input type="radio" value="1" name="rdQueen" /> Scaramouche</label> <br />
<label><input type="radio" value="1" name="rdQueen" /> Will you do the</label> <br />
<label><input type="radio" value="1" name="rdQueen" /> Fandango</label> <br />
...稍后在页面中...
... sometime later in the page ...
<label><input type="radio" value="1" name="rdFruit" /> Mango</label> <br />
<label><input type="radio" value="1" name="rdFruit" /> Kiwi</label> <br />
<label><input type="radio" value="1" name="rdFruit" /> Potato</label> <br />
我要做的就是确保从两个组中至少选择了一个..因此，我需要对已选中的单选按钮进行计数，在这种情况下为2.
All I want to do is make sure atleast one of them from both group has been selected.. so I need to count the radiobuttons that have been checked, in this case it'll be 2.
仅，我不确定该怎么做.请帮忙！
Only, I am not sure how to do that. help please!
答
仅检查那些特定的组:
$(':radio[name="rdQueen"]:checked, :radio[name="rdFruit"]:checked').length;