标签:分享 TE javascrip body ima http port else func
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>Document</title> <script src="../0622/jquery-3.3.1.min.js" type="text/javascript" charset="utf-8"></script> </head> <body> <!--每选择一次年重置一下月和日--> <select class="year" onchange="month(),day()"></select> <!--每选择一次月重置一下日--> <select class="month" onchange="day()"></select> <select class="day"></select> </body> </html>
<script type="text/javascript"> $(function(){ year(); month(); day(); }) function year(){ var year = new Date().getFullYear(); var str = ""; for (var i = year-10;i<year+10;i++) { str += "<option>"+i+"</option>"; } $(".year").html(str); } function month(){ var year = new Date().getMonth(); var str = ""; for (var i = 1;i<13;i++) { str += "<option>"+i+"</option>"; } $(".month").html(str); } function day(){ // 选则日之前先获取年和月 var year_val = $(".year").val(); var month_val = $(".month").val(); var day_val = 30; // 闰年的判断:普通年(不能被100整除的年份)能被4整除的为闰年。(如2004年就是闰年,1999年不是闰年);世纪年(能被100整除的年份)能被400整除的是闰年。(如2000年是闰年,1900年不是闰年); if(month_val == 1 || month_val == 3 || month_val == 5 || month_val == 7 || month_val == 8 || month_val == 10 || month_val == 12){ day_val = 31; }else if(month_val == 2){ if((year_val%4 == 0 && year_val%100 != 0)||year_val%400 == 0){ day_val = 29; }else{ day_val = 28; } } var year = new Date().getDate(); var str = ""; for (var i = 1;i<=day_val;i++) { str += "<option>"+i+"</option>"; } $(".day").html(str); } </script>
标签:分享 TE javascrip body ima http port else func
原文地址:https://www.cnblogs.com/zhangbaozhong/p/9221825.html