<button onclick="displayDate()">The time is?</button>
<script>
function displayDate() {
document.getElementById("demo").innerHTML = Date();
}
</script><!DOCTYPE html>
<html>
<body>
<button type="button"
onclick="document.getElementById('display').innerHTML = Date()">
Click me to display Date and Time.</button>
<p id="display"></p>
</body>
</html>var d = new Date(),
minutes = d.getMinutes().toString().length == 1 ? '0'+d.getMinutes() : d.getMinutes(),
hours = d.getHours().toString().length == 1 ? '0'+d.getHours() : d.getHours(),
ampm = d.getHours() >= 12 ? 'pm' : 'am',
months = ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
days = ['Sun','Mon','Tue','Wed','Thu','Fri','Sat'];
return days[d.getDay()]+' '+months[d.getMonth()]+' '+d.getDate()+' '+d.getFullYear()+' '+hours+':'+minutes+ampm;