JavaScript获取当前日期时间同时显示星期几，具体代码如下：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
<script type="text/javascript">
function currentTime(){
var d=new Date(),str='';
str+=d.getFullYear()+'年';
str+=parseInt(d.getMonth()) + 1+'月';
str+=d.getDate()+'日';
str+=d.getHours()+'时';
str+=d.getMinutes()+'分';
str+= d.getSeconds()+'秒';
return str;
}
setInterval(function(){$('#time').html(currentTime)},1000);
</script>
</head>
<body>
<div id="time"></div>
</body>
</html>
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=parseInt(time.getMonth());
var date=time.getDate();
var day=time.getDay();
var hour=time.getHours();
var minutes=time.getMinutes();
var second=time.getSeconds();
month=parseInt(month)+1;
month<10?month='0'+month:month;
hour<10?hour='0'+hour:hour;
minutes<10?minutes='0'+minutes:minutes;
second<10?second='0'+second:second;
var now_time='当前时间：'+year+'年'+month+'月'+date+'日'+' '+show_day[day-1]+' '+hour+':'+minutes+':'+second;
document.getElementById('showtime').innerHTML=now_time;
setTimeout("showTime();",1000);
}