var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose; 


function mopen2(id) {
	var i = 1;
	for (i =1; i <= 5; i++) {
		d= "s"+i;
		document.getElementById(d).style.background = "#FFFFFF";
		document.getElementById(d).style.color = "#3291C1";
	}
	
	page = id+".html";
	document.getElementById("p1").src = page;
	document.getElementById(id).style.background = "#3291C1";
	document.getElementById(id).style.color = "#FFFFFF";
}


function mopen3(id) {
	var i = 6;
	for (i =6; i <= 10; i++) {
		d= "s"+i;
		document.getElementById(d).style.background = "#FFFFFF";
		document.getElementById(d).style.color = "#3291C1";
	}
	
	page = id+".html";
	document.getElementById("p1").src = page;
	document.getElementById(id).style.background = "#3291C1";
	document.getElementById(id).style.color = "#FFFFFF";
}

function mopen4(id) {
	var i = 11;
	for (i =11; i <= 15; i++) {
		d= "s"+i;
		document.getElementById(d).style.background = "#FFFFFF";
		document.getElementById(d).style.color = "#3291C1";
	}
	
	page = id+".html";
	document.getElementById("p1").src = page;
	document.getElementById(id).style.background = "#3291C1";
	document.getElementById(id).style.color = "#FFFFFF";
}

function mopen5(id) {
	var i = 16;
	for (i =16; i <= 20; i++) {
		d= "s"+i;
		document.getElementById(d).style.background = "#FFFFFF";
		document.getElementById(d).style.color = "#3291C1";
	}
	
	page = id+".html";
	document.getElementById("p1").src = page;
	document.getElementById(id).style.background = "#3291C1";
	document.getElementById(id).style.color = "#FFFFFF";
}