var timeout	= 500;
var closetimer	= 0;
var itemshow	= 0;
var topshow	= 0;

document.onclick = mclose;

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

	// close old layer
	if(itemshow)
	{
		itemshow.style.visibility = 'hidden';
	}
	if(topshow)
	{
		topshow.style.backgroundColor = 'white';
		topshow.style.color = 'black';
		topshow.style.borderColor = "#006699";
	}
	// get new layer and show it
	itemshow = document.getElementById(id);
	itemshow.style.visibility = 'visible';
	
	topshow = document.getElementById(topnum);
	topshow.style.backgroundColor = '#006699';
	topshow.style.color = 'white';
	topshow.style.borderColor = "black";

}
// close showed layer
function mclose()
{
	if(itemshow)
	{
		itemshow.style.visibility = 'hidden';
	}
	if(topshow)
	{
		topshow.style.backgroundColor = 'white';
		topshow.style.color = 'black';
		topshow.style.borderColor = "#006699";
	}
}

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

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