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

// open hidden layer
function mopen(id)
{	 
	document.onclick = null;
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.display = 'none';

	// Get Sourcewidth
	ddmenubutton = document.getElementById('nav_'+id);
	ddmenuitem = document.getElementById('nav_'+id+'_dropdown');
	
	// Resize the menu
	var newWidth = parseInt(ddmenubutton.style.width)+16;
	//alert(ddmenuitem.style.width);
	ddmenuitem.style.minWidth = newWidth+'px'; 
	
	// get new layer and show it
	ddmenuitem.style.display = 'block';
	
}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.display = 'none';
}

// 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;