function mouseoverImg(obj)
	{
		obj.src = obj.src.replace("_off","_on");
	}

function mouseoutImg(obj)
	{
		obj.src = obj.src.replace("_on","_off");
	}
function newwin() 
{
window.open("map.htm","java","width=517 , height=445 , top=200 , left=300 , scrollbars=no , status=yes");
}

var timeout	= 500;
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;