javascript 获取日期和星期

<!DOCTYPE html>  <html>  <head>    <meta charset="UTF-8">    <title>TT</title>    <script src="jquery.js"></script>  </head>  <body>  <p style="line-height: 50%;"><span></span></p>  <input type="button" value="轻轻" onclick="syncTime()">  <script>      function syncTime(){         var mydate = new Date();         var week;         switch (mydate.getDay()){         case 1: week="星期一"; break;         case 2: week="星期二"; break;         case 3: week="星期三"; break;         case 4: week="星期四"; break;         case 5: week="星期五"; break;         case 6: week="星期六"; break;         default: week="星期天";         }         var str = "" + mydate.getFullYear() + " 年 " + (mydate.getMonth() + 1) + " 月 " + mydate.getDate() + " 日 " + week;         $('.todaytime')[0].innerHTML = str;         str = '"savesynctime" : "' + str + '"'         return str;      }      console.log(syncTime());  </script>  </body>  </html>
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javascript 获取日期和星期
