var subMenuTimer = null;
var curPageId = "";
var preloadFlag = false;

function checkRollup(e)
{
	ancestors = e.element().ancestors();
	p = ancestors.find(function(e) { return e.hasClassName("subtable"); });
	if (p)
	{
		$('rollup').getElementsBySelector('div[class="Subgrey"]').each(
			function(e)
			{
				e.getElementsBySelector('div[class="main"]').each(function(e) {e.hide()});
				e.getElementsBySelector('img[class="rollover"]').each(function(e) {e.src="./images/arrow.jpg"});						
			}
		);
	}
	p = ancestors.find(function(e) { return e.hasClassName("Subgrey"); });
	p.getElementsBySelector('div[class="main"]').each(function(e) {e.show()});
	p.getElementsBySelector('img[class="rollover"]').each(function(e) {e.src="./images/arrowdown.jpg"});						
}

function highlightRollup(e)
{
	ancestors = e.element().ancestors();
	p = ancestors.find(function(e) { return e.hasClassName("subtable"); });
	if (p)
	{
		p.getElementsBySelector('td[class="rollovertext"]').each(function(e) {e.addClassName('Suborange');});
	}
}

function unHighlightRollup(e)
{
	ancestors = e.element().ancestors();
	p = ancestors.find(function(e) { return e.hasClassName("subtable"); });
	if (p)
	{
		p.getElementsBySelector('td[class="rollovertext Suborange"]').each(function(e) {e.removeClassName('Suborange');});
	}
}

function showMenu(menu, e)
{
	// remove timer for submenu
	removeSubMenuTimer();
	$(menu).setStyle({left: $(e).positionedOffset()[0]+"px"});
	$(menu).show();
}
	
function hideMenu(menu, e)
{
	// run a timer here to hide menu and have mouseover on menu to remove timer
	if (!subMenuTimer)
	{
		subMenuTimer = setTimeout ( "$('"+(menu == $(menu)?menu.id:menu)+"').hide()", 10 );
	}
}

function removeSubMenuTimer()
{
	if (subMenuTimer)
	{
		clearTimeout(subMenuTimer);
		subMenuTimer = null;
	}
}
	
function doInit()
{
	if (document.images) {
		pre_CNMO_01 = newImage('images/images/CNMO_01.jpg');
		pre_CNMO_02 = newImage('images/images/CNMO_02.jpg');
		pre_CNMO_03 = newImage('images/images/CNMO_03.jpg');
		pre_CNMO_04 = newImage('images/images/CNMO_04.jpg');
		pre_CNMO_05 = newImage('images/images/CNMO_05.jpg');
		pre_CNMO_06 = newImage('images/images/CNMO_06.jpg');
		pre_CNMO_07 = newImage('images/images/CNMO_07.jpg');
		pre_CNMO_08 = newImage('images/images/CNMO_08.jpg');
		pre_CNMO_09 = newImage('images/images/CNMO_09.jpg');
		pre_CNMO_10 = newImage('images/images/CNMO_10.jpg');
		pre_CNMO_11 = newImage('images/images/CNMO_11.jpg');
		pre_CNMO_12 = newImage('images/images/CNMO_12.jpg');
		preloadFlag = true;
	}

	if ($('rollup'))
	{
		$('rollup').getElementsBySelector('div[class="Subgrey"]').each(
			function(e,i)
			{
				if (i > 0)
				{
					e.getElementsBySelector('div[class="main"]').each(function(e) {e.hide();});
				}
				else
				{
					e.getElementsBySelector('img[class="rollover"]').each(function(e) {e.src="./images/arrowdown.jpg";});
				}
			}
		);

		$('rollup').observe('click', checkRollup);
		$('rollup').observe('mouseover', highlightRollup);
		$('rollup').observe('mouseout', unHighlightRollup);
	}
	
	// set hilight image for page
	if ($('CN3_'+curPageId))
	{
		$('CN3_'+curPageId).src = "images/cnimages/"+'CN3mo_'+curPageId+".jpg";
	}
}