2018-11-05

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title></title>
        <style>
            h1 { font: 72px arial; }
            #bar { color: red; }
            .foo { color: green; }
            h1 { color: blue !important; }
            #timer {
                width: 250px;
                height: 30px;
                line-height: 30px;
                text-align: center;
                color: yellow;
                background-color: blue;
                float: right;
            }
        </style>
    </head>
    <body>
        <div id="timer"></div>
        <h1 id="bar" class="foo">Hello, world!</h1>
        <button onclick="shutdown()">關閉</button>
        <button onclick="openBaidu()">打開百度</button>
        <script>
            function openBaidu() {
                window.open('https://www.baidu.com', '', 
                    'width=300,height=200');
            }
            
            function shutdown() {
                if (window.confirm('確定要退出嗎？')) {
                    window.close();
                }
            }
            
            var weekdays = ['日', '一', '二', '三', '四', '五', '六'];
            
            function showTime() {
                var now = new Date();
                var year = now.getFullYear();
                var month = now.getMonth() + 1;
                var date = now.getDate();
                var hour = now.getHours();
                var minute = now.getMinutes();
                var second = now.getSeconds();
                var day = now.getDay();
                var timeStr = year + '年' +
                    (month < 10 ? '0' : '') + month + '月' +
                    (date < 10 ? '0' : '') + date + '日 ' +
                    (hour < 10 ? '0' : '') + hour + ':' +
                    (minute < 10 ? '0' : '') + minute + ':' +
                    (second < 10 ? '0' : '') + second +
                    ' 星期<b>' + weekdays[day] + '</b>';
                var div = document.getElementById('timer');
                div.innerHTML = timeStr;
            }
            
            showTime();
            window.setInterval(showTime, 1000);
                
            // 1TBS風格 - C/Unix - Dennis M. Ritchie
            // Allman風格 - FreeBSD - Allman
            // while循環(huán) / do-while循環(huán) / for循環(huán)
            // while循環(huán) - 不確定循環(huán)的次數(shù)
            // for循環(huán) - 循環(huán)的次數(shù)是確定的
            // do-while循環(huán) - 至少執(zhí)行一次
//          var flag = true;
//          do {
//              var yearStr = window.prompt('請輸入年份: ');
//              var year = parseInt(yearStr);
//              if (year == yearStr && year > 0) {
//                  if (year % 4 == 0 && year % 100 != 0
//                      || year % 400 == 0) {
//                      window.alert(year + '年是閏年');
//                  } else {
//                      window.alert(year + '年不是閏年');
//                  }
//                  flag = window.confirm('是否繼續(xù)？');
//              } else {
//                  window.alert('請輸入有效的年份!');
//              }
//          } while (flag);
        </script>
    </body>
</html>
最后編輯于：2018.11.05 20:43:26
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