1.判断check是否选中
<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>判断check是否被选中</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="apple-mobile-web-app-capable" /> ???<meta content="black" name="apple-mobile-web-app-status-bar-style" /> ???<meta content="telephone=no" name="format-detection" /> ???<style type="text/css"> ???????*{margin:0; padding: 0} ???????body{font:14px/1.4 "Microsoft Yahei",Arial,Helvetica,sans-serif;background-color: #fff;color:#333;max-width: 640px;margin: 0 auto;} ???????a{ text-decoration: none; color: #333 } ???????/*btn*/ ???????.public_btn_s {padding: 10px 0; margin: 0 10px;} ???????.public_btn_s a { display: block; height: 34px; line-height: 34px; text-align: center; font-size: 18px; background-color: #31b6e7; color: #fff; border-radius: 5px; -o-border-radius: 5px; -ms-border-radius: 5px; -moz-border-radius: 5px; -webkit-border-radius: 5px; } ???</style></head><body> ???<div class="public_agreement"> ???????<input type="checkbox" id="agreeInput" value="on">同意<a href="javascript:;" >个人隐私协议</a> ???</div> ???<div class="public_btn_s"> ???????<a href="javascript:;" class="J_ajax_submit_btn">点击查看</a> ???</div> ???<script src="http://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js" type="text/javascript"></script> ???<script type="text/javascript"> ???????$(function () { ???????????//按钮点击 ???????????$(‘.J_ajax_submit_btn‘).on(‘click‘,function(){ ???????????????if($(‘#agreeInput‘).length){ ???????????????????if(!($(‘#agreeInput‘).is(‘:checked‘))){ ???????????????????????alert(‘您未同意个人隐私协议‘); ???????????????????????return false; ???????????????????}else{ ???????????????????????var url = ‘http://www.baidu.com‘; ???????????????????????window.location.href=url; ???????????????????} ???????????????} ???????????}); ???????}) ???</script> ???</body></html>2.判断div是否被选中
<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>判断div是否被选中</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="apple-mobile-web-app-capable" /> ???<meta content="black" name="apple-mobile-web-app-status-bar-style" /> ???<meta content="telephone=no" name="format-detection" /> ???<style type="text/css"> ???????*{margin:0; padding: 0} ???????body{font:14px/1.4 "Microsoft Yahei",Arial,Helvetica,sans-serif;background-color: #fff;color:#333;max-width: 640px;margin: 0 auto;} ???????a{ text-decoration: none; color: #333 } ???????/*选项卡*/ ???????.form_tab{ overflow: hidden; background-color: #fffdf0; margin:5px 10px; border:1px solid #f9a268; border-radius: 5px;} ???????.ft_top{ overflow: hidden; height: 37px;line-height: 36px;} ???????.ft_top a{float: left; width: 50%; box-sizing: border-box; border-right:1px solid #f9a268; text-align: center; background-color: #ffedda; border-bottom:1px solid #f9a268;} ???????.ft_top a:last-child{ border-right:0} ???????.ft_top a:hover,.ft_top a.current{ background-color: #fffdf0; border-top:2px solid #db2121; color: #db2121;} ???????.ft_top a.current{ border-bottom:0} ???????.ft_con{overflow: hidden;padding:20px 10px ;} ???????.ft_con a{ height: 25px; line-height: 25px; padding:0 10px; border:1px solid #f9a268; background-color: #ffddbb;float:left; margin:0 5px; border-radius: 3px;} ???????.ft_con a.current{ color: #db2121; border-color: #db2121;} ???????/*btn*/ ???????.public_btn_s {padding: 10px 0; margin: 0 10px;} ???????.public_btn_s a { display: block; height: 34px; line-height: 34px; text-align: center; font-size: 18px; background-color: #31b6e7; color: #fff; border-radius: 5px; -o-border-radius: 5px; -ms-border-radius: 5px; -moz-border-radius: 5px; -webkit-border-radius: 5px; } ???</style></head><body> ???<div class="form_tab"> ???????<div class=" ft_top" id="tabMenu"> ???????????<a href="javascript:;" class="current">转盘法（排盘法）</a> ???????????<a href="javascript:;">飞盘法（排盘法）</a> ???????</div> ???????<div class="ft_con "id="tabCon"> ???????????<a href="javascript:;">置润法</a> ???????????<a href="javascript:;">拆补法</a> ???????????<a href="javascript:;">茅山道人法</a> ???????</div> ???</div> ???<div class="public_btn_s"> ???????<a href="javascript:;" class="J_ajax_submit_btn">点击查看</a> ???</div> ???<script src="http://apps.bdimg.com/libs/jquery/1.9.1/jquery.min.js" type="text/javascript"></script> ???<script type="text/javascript"> ???????$(function () { ???????????$("#tabMenu a").on(‘click‘,function () { ???????????????$(this).addClass(‘current‘).siblings().removeClass(‘current‘); ???????????}); ???????????$(‘#tabCon a‘).on(‘click‘,function () { ???????????????$(this).addClass(‘current‘).siblings().removeClass(‘current‘); ???????????}); ???????????//按钮点击 ???????????$(‘.J_ajax_submit_btn‘).on(‘click‘,function(){ ???????????????if($(‘#tabCon a‘).length){ ???????????????????if(!($(‘#tabCon a‘).is(‘.current‘))){ ???????????????????????alert(‘您未选择排盘方法‘); ???????????????????????return false; ???????????????????}else{ ???????????????????????var url = ‘http://www.baidu.com‘; ???????????????????????window.location.href=url; ???????????????????} ???????????????} ???????????}); ???????}) ???</script> ???</body></html>效果图：
jQuery判断是否选中
原文地址：https://www.cnblogs.com/huanghuali/p/8868076.html