jQuery判斷是否選中

1.判斷check是否選中

doctype html

>
<
html 
lang
="en"
>
<
head
>
<
meta 
charset
="utf-8"
>
<
title
>判斷check是否被選中
title
>
<
meta 
name
="viewport"
content
="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
/>
<
meta 
content
="yes"
name
/>
<
meta 
content
="black"
name
/>
<
meta 
content
="telephone=no"
name
="format-detection"
/>
<
style 
type
="text/css"
>
*bodya/*
btn*/
.public_btn_s 
.public_btn_s a 
style
>
head
>
<
body
>
<
div 
class
="public_agreement"
>
<
input 
type
="checkbox"
id="agreeinput"
value
="on"
>同意<
a href
="j**ascript:;"
>個人隱私協議
2.判斷div是否被選中
doctype html

>
<
html 
lang
="en"
>
<
head
>
<
meta 
charset
="utf-8"
>
<
title
>判斷div是否被選中
title
>
<
meta 
name
="viewport"
content
="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
/>
<
meta 
content
="yes"
name
/>
<
meta 
content
="black"
name
/>
<
meta 
content
="telephone=no"
name
="format-detection"
/>
<
style 
type
="text/css"
>
*bodya/*
選項卡*/
.form_tab
.ft_top
.ft_top a
.ft_top a:last-child
.ft_top a:hover,.ft_top a.current
.ft_top a.current
.ft_con
.ft_con a
.ft_con a.current
/*btn
*/.public_btn_s 
.public_btn_s a 
style
>
head
>
<
body
>
<
div 
class
="form_tab"
>
<
div 
class
=" ft_top"
id="tabmenu"
>
<
a href
="j**ascript:;"
class
="current"
>轉盤法（排盤法）
a>
<
a href
="j**ascript:;"
>飛盤法（排盤法）
a>
div>
<
div 
class
="ft_con "
id="tabcon"
>
<
a href
="j**ascript:;"
>置潤法
a>
<
a href
="j**ascript:;"
>拆補法
a>
<
a href
="j**ascript:;"
>茅山道人法
a>
div>
div>
<
div 
class
="public_btn_s"
>
<
a href
="j**ascript:;"
class
="j_ajax_submit_btn"
a>
div>
<
script 
srctype
="text/j**ascript"
>
script
>
<
script 
type
="text/j**ascript"
>
$(function
() );
$('#tabcon a
').on(
'click',
function
() );
//按鈕點選$('
.j_ajax_submit_btn
').on(
'click',
function
()else
}});
})script
>
body
>
html
>
效果圖：

判斷是否隱藏 
$("#div").is(":visible")

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JQuery判斷CheckBox是否選中

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JQuery判斷CheckBox是否選中

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