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

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

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	if(ddlinkitem) $(ddlinkitem).removeClass('linkhover');

	// get new layer and show it
	ddmenuitem = document.getElementById('dropdown-'+id);
	ddmenuitem.style.visibility = 'visible';
	
	//change class of the link
	ddlinkitem = document.getElementById('link-'+id);
	$(ddlinkitem).addClass('linkhover');

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

// 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 a(id){
//$('.dropdown').css('visibility','hidden');
//$('#links a').removeClass('linkhover');
$('#dropdown-'+id).css('visibility','visible');
$('#link-'+id).addClass('linkhover');



};

function b(id){

t=setTimeout(function(){c(id)},600);

};

function c(id){

$('#link-'+id).removeClass('linkhover');
$('#dropdown-'+id).css('visibility','hidden');


};

*/