var timeout		= 0;
var closetimer	= 0;
var ddmenuitem	= 0;
var dddiv = 0;
var li = 0;
var a = 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;
	}
}

function setbg(dddiv)
{
	li = document.getElementById(dddiv+'-tab');
	a = document.getElementById(dddiv+'-tab-a');
	li.style.background = "url('images/header/tab_left-on.jpg') no-repeat left top";
	a.style.background = "url('images/header/tab_right-on.jpg') no-repeat right top";
}

function forgetbg(dddiv)
{
	li = document.getElementById(dddiv+'-tab');
	a = document.getElementById(dddiv+'-tab-a');
	if (li.className != "active")
	{
		li.style.background = "url('images/header/tab_left.jpg') no-repeat left top";
		a.style.background = "url('images/header/tab_right.jpg') no-repeat right top";
	}
}

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