var timeout        = 50;

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;