//
//Menu
//

var timeout         = 100;
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;

//
//Info Menu
//

var infoDisplay	= 0;

// open hidden layer
function info(id)
{	
	infoDisplay = document.getElementById(id);
	infoDisplay.style.visibility = 'visible';

}
// close showed layer
function infoClose()
{
	if(infoDisplay) infoDisplay.style.visibility = 'hidden';
}
// close layer when click-out
document.onclick = infoClose;

//
//Rollover
//

function roll(img_name, img_src)
   {
   document[img_name].src = img_src;
   }