1创建一个Date对象如var today = new Date2通过Date对象的getFullYear方法获得年份通过getMonth方法获得月份0~11通过getDate方法获得天数通过getDay方法获得一个星期中星期几获取的是0~6数字使用JavaScript对象获取相应的星期数如下所示 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 3通过D

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 myTime = setInterval("clock_12h()", 1000)