在开发中我们往往需要对某单选框或复选框的选中状态做判断,看了看网上有的写的好麻烦好麻烦，最标准的也是最简单就是用is()来进行判断：
Jquery版本，请确保你已经导入jquery：
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<div>
<input type=
"radio"
name=
"check"
id=
"first"
>
<input type=
"radio"
name=
"check"
id=
"second"
>
<input type=
"radio"
name=
"check"
id=
"third"
>
</div>
<script type=
"text/javascript"
>
$(
function
(){
$(
"input:radio[name='check']"
).change(
function
(){
$(
"input:radio[name='check']"
).each(
function
(){
alert($(this).attr(
'id'
)+
' is '
+$(this).is(
':checked'
));
});
});
});
</script>
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JS版本：
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<div>
<input type=
"radio"
name=
"check"
id=
"first"
>
<input type=
"radio"
name=
"check"
id=
"second"
>
<input type=
"radio"
name=
"check"
id=
"third"
>
</div>
<button onclick=
"checkStatus()"
>JS测试选中状态</button>
<!--js版本-->
<script type=
"text/javascript"
>
function
checkStatus(){
var
radios = document.getElementsByName(
'check'
);
for
(
var
i = 0; i < radios.length; i ++) {
if
(radios[i].checked) {
alert(radios[i].getAttribute(
'id'
)+
' is checked!'
);
}
else
{
alert(radios[i].getAttribute(
'id'
)+
' is not checked!'
);
}
}
}
</script>
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转播
