得到时间
<body>
<p id="demo">点击按钮把日期和时间转换成字符串。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
var d = new Date();
var x = document.getElementById("demo");
x.innerHTML=d.toUTCString();
}
</script>
</body>
<body>
<p id="demo">周几</p>
<button onclick="myFunction()">获取</button>
<script>
function myFunction(){
var d = new Date();
var weekday=new Array(7);
weekday[0]="周日";
weekday[1]="周一";
weekday[2]="周二";
weekday[3]="周三";
weekday[4]="周四";
weekday[5]="周五";
weekday[6]="周六";
var x = document.getElementById("demo");
x.innerHTML=weekday[d.getDay()];
}
<script>
function startTime(){
var today=new Date();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();// 在小于10的数字前加一个‘0’
m=checkTime(m);
s=checkTime(s);
document.getElementById('txt').innerHTML=h+":"+m+":"+s;
t=setTimeout(function(){startTime()},500);
}
function checkTime(i){
if (i<10){
i="0" + i;
}
return i;
}
</script>
</head>
<body onload="startTime()">
二.从网络上学习的时间获取，代码为转载