<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
<script>
var d=new Date();
document.write(d);
</script>
</body>
</html>
<! DOCTYPE HTML >
< HTML >
< head >
< Meta charset = "UTF-. 8" >
< title > novice tutorial (runoob.com) </ title >
</ head >
< body >
< P ID = "Demo" > click the button to get the current year. </ The p- >
< the Button onclick = "myFunction ()" > point I </ the Button >
< Script >
var d = new Date();
var x = document.getElementById("demo");
x.innerHTML=d.getFullYear();
}
</script>
</body>
</html>
<! DOCTYPE HTML >
< HTML >
< head >
< Meta charset = "UTF-. 8" >
< title > novice tutorial (runoob.com) </ title >
</ head >
< body >
< P ID = "Demo" > click the button to display the number of milliseconds January 1970 No. 1 since. </ The p- >
< the Button onclick = "myFunction ()" > point I </ the Button >
< Script >
var d = new Date();
var x = document.getElementById("demo");
x.innerHTML=d.getTime();
}
</script>
</body>
</html>
<! DOCTYPE HTML >
< HTML >
< head >
< Meta charset = "UTF-. 8" >
< title > novice tutorial (runoob.com) </ title >
</ head >
< body >
< P ID = "Demo" > click the button to display the date modified. </ The p- >
< the Button onclick = "myFunction ()" > point I </ the Button >
< Script >
var D = new new a Date ();
d.setFullYear ( 2020 , 10 , . 3 );
var X = document.getElementById ( " Demo " );
x.innerHTML = D;
}
</ Script >
< P > remember several months JavaScript from 0 to 11.10 in November. </ P >
</ body >
</ HTML >
<! DOCTYPE HTML >
< HTML >
< head >
< Meta charset = "UTF-. 8" >
< title > novice tutorial (runoob.com) </ title >
</ head >
< body >
< P ID = "Demo" > click the button to convert utc date and time to a string. </ The p- >
< the Button onclick = "myFunction ()" > point I </ the Button >
< Script >
var d = new Date();
var x = document.getElementById("demo");
x.innerHTML=d.toUTCString();
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
<p id="demo">单击按钮显示今天周几</p>
<button onclick="myFunction()">点我</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>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<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()">
<div id="txt"></div>
</body>
</html>
var x=new Date();
x.setFullYear(2100,0,14);
var today = new Date();
if (x>today)
{
alert("今天是2100年1月14日之前");
}
else
{
alert("今天是2100年1月14日之后");
}