闰年判断与天数-优快云博客

本文链接：https://blog.youkuaiyun.com/keyboysgood/article/details/122487483

<!DOCTYPE html>
<html>
   <head>
       <meta charset="utf-8">
       <title></title>
       <script type="text/javascript">
           function fangFa01(){
               var daYue=31;
               var xiaoYue=30;
               var runErYue=29;
               var pinErYue=28;
               var year=document.getElementById("tt01").value;
               var yue=document.getElementById("tt02").value;
               var result = ((year % 400) == 0) || (((year % 100) != 0) && ((year % 4) == 0));
               result = result ? "闰年" :"平年";
               document.getElementById("tt01").value=result;
               if(result=='闰年'){
                   switch(yue){
                       case '1':
                       document.getElementById("tt02").value=daYue;break;
                       case '2':
                       document.getElementById("tt02").value=runErYue;break;
                       case '3':
                       document.getElementById("tt02").value=daYue;break;
                       case '4':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '5':
                       document.getElementById("tt02").value=daYue;break;
                       case '6':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '7':
                       document.getElementById("tt02").value=daYue;break;
                       case '8':
                       document.getElementById("tt02").value=daYue;break;
                       case '9':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '10':
                       document.getElementById("tt02").value=daYue;break;
                       case '11':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '12':
                       document.getElementById("tt02").value=daYue;break;
                   }
                   }
               if (result=='平年'){
                   switch(yue){
                       case '1':
                       document.getElementById("tt02").value=daYue;break;
                       case '2':
                       document.getElementById("tt02").value=pinErYue;break;
                       case '3':
                       document.getElementById("tt02").value=daYue;break;
                       case '4':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '5':
                       document.getElementById("tt02").value=daYue;break;
                       case '6':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '7':
                       document.getElementById("tt02").value=daYue;break;
                       case '8':
                       document.getElementById("tt02").value=daYue;break;
                       case '9':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '10':
                       document.getElementById("tt02").value=daYue;break;
                       case '11':
                       document.getElementById("tt02").value=xiaoYue;break;
                       case '12':
                       document.getElementById("tt02").value=daYue;break;
               }
           }
           }
       </script>
   </head>
   <body>
       <div id="box">
           <div id="box01">
               请输入年份：<input type="text" name="" id="tt01" value="" />
           </div>
           <div id="box02">
               请输入月份：<input type="text" name="" id="tt02" value="" />
           </div>
           <div id="btn01">
               <input type="button" name="" id="" οnclick="fangFa01()" value="识别" />
           </div>
       </div>
   </body>
</html>

闰平年月份