JavaScript 实现 12 小时制时钟和日期显示

function clock_12h() { var today = new Date(); var year = today.getFullYear(); var month = today.getMonth() + 1; var day = today.getDate(); var weekday = week[today.getDay()]; var hour = today.getHours(); var minute = today.getMinutes(); var second = today.getSeconds(); var ampm = hour >= 12 ? 'PM' : 'AM'; hour = hour % 12; hour = hour ? hour : 12; minute = minute < 10 ? '0' + minute : minute; second = second < 10 ? '0' + second : second; var time = hour + ':' + minute + ':' + second + ' ' + ampm; var date = month + '/' + day + '/' + year; document.getElementById('clock').innerHTML = time; document.getElementById('date').innerHTML = weekday + ', ' + date; }

var week = { 0: '星期日', 1: '星期一', 2: '星期二', 3: '星期三', 4: '星期四', 5: '星期五', 6: '星期六' };

var myTime = setInterval('clock_12h()', 1000);