Write a JavaScript program to display today's date and current time.
<HTML>
<HEAD>
<TITLE>Displaying Time</TITLE>
</HEAD>
<BODY>
<CENTER>
<H1>Today's Date and Current Time</H1>
</CENTER>
<SCRIPT type="text/javascript">
var today = new Date();
document.write("<H3>");
document.write(today);
document.write("</H3>");
</SCRIPT>
</BODY>
</HTML>
