// open hidden layer
var ddmenuitem;

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()
{
	ddmenuitem.style.visibility = 'hidden';
}

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