JavaScript获取当前日期时间同时显示星期几，具体代码如下：
在网页上及时动态显示当前的日期时间并显示星期的做法：
function showTime() {
var show_day = new Array(‘星期一‘, ‘星期二‘, ‘星期三‘, ‘星期四‘, ‘星期五‘, ‘星期六‘, ‘星期日‘);
var time = new Date();
var year = time.getFullYear();
var month = time.getMonth() + 1;
var date = time.getDate();
var day = time.getDay();
var hour = time.getHours();
var minutes = time.getMinutes();
var second = time.getSeconds();
month < 10 ? month = ‘0‘ + month : month;
//month = month + 1;
//alert(year);
hour < 10 ? hour = ‘0‘ + hour : hour;
minutes < 10 ? minutes = ‘0‘ + minutes : minutes;
second < 10 ? second = ‘0‘ + second : second;
var now_time = year + ‘年‘ + month + ‘月‘ + date + ‘日‘ + ‘ ‘ + show_day[day - 1] + ‘ ‘ + hour + ‘:‘ + minutes + ‘:‘ + second;
document.getElementById(‘lishow‘).innerHTML = now_time;
//setTimeout("showTime();", 1000);
}
setInterval("showTime();", 1000);
原文：http://www.cnblogs.com/wanshutao/p/4310248.html