//Menu Dropdown Onclick
var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

function mopen(id)
{	
	mcancelclosetime();

	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
}

function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

<!-- Digital Clock
/* showClock() function extracts the current time hours, minutes and seconds and then displays them in the div with showText id from the BODY section */

function showClock()
{
var clock=new Date();
var hours=clock.getHours();
var minutes=clock.getMinutes();
var seconds=clock.getSeconds();
// for a nice disply we'll add a zero before the numbers between 0 and 9
if (hours<10){
hours="0" + hours;
}
if (minutes<10){
minutes="0" + minutes;
}
if (seconds<10){
seconds="0" + seconds;
}
document.getElementById('showText').innerHTML=hours+":"+minutes+":"+seconds;
t=setTimeout('showClock()',500);
/* setTimeout() JavaScript method is used to call showClock() every 1000 milliseconds (that means exactly 1 second) */
}
<!-- End Digital Clock