// This script loads images for hover buttons and defines rollover actions
if (document.images)  {

	var ntaaaoff = new Image() ; ntaaaoff.src = "buttons/m_buttons_d_02.gif";
	var ntaaashv = new Image() ; ntaaashv.src = "buttons/m_buttons_o_02.gif";
	
	var ntbbboff = new Image() ; ntbbboff.src = "buttons/m_buttons_d_03.gif";
	var ntbbbshv = new Image() ; ntbbbshv.src = "buttons/m_buttons_o_03.gif";
	
	var ntcccoff = new Image() ; ntcccoff.src = "buttons/m_buttons_d_04.gif";
	var ntcccshv = new Image() ; ntcccshv.src = "buttons/m_buttons_o_04.gif";
	
	var ntdddoff = new Image() ; ntdddoff.src = "buttons/m_buttons_d_05.gif";
	var ntdddshv = new Image() ; ntdddshv.src = "buttons/m_buttons_o_05.gif";
	
	var nteeeoff = new Image() ; nteeeoff.src = "buttons/m_buttons_d_06.gif";
	var nteeeshv = new Image() ; nteeeshv.src = "buttons/m_buttons_o_06.gif";	
	
	var ntfffoff = new Image() ; ntfffoff.src = "buttons/m_buttons_d_07.gif";
	var ntfffshv = new Image() ; ntfffshv.src = "buttons/m_buttons_o_07.gif";
	
	var ntgggoff = new Image() ; ntgggoff.src = "buttons/m_buttons_d_08.gif";
	var ntgggshv = new Image() ; ntgggshv.src = "buttons/m_buttons_o_08.gif";
	
	var nthhhoff = new Image() ; nthhhoff.src = "buttons/m_buttons_d_09.gif";
	var nthhhshv = new Image() ; nthhhshv.src = "buttons/m_buttons_o_09.gif";
	
	var ntiiioff = new Image() ; ntiiioff.src = "buttons/m_buttons_d_10.gif";
	var ntiiishv = new Image() ; ntiiishv.src = "buttons/m_buttons_o_10.gif";
	
		
	}


// flip images and show popup menu

function roll(imgName,newImg,currElem) {
	if(document.images) {
		document[imgName].src = eval(newImg + ".src");
	}
	dom = document.getElementById(currElem).style;
	state = dom.visibility;
		if (state == "visible") {
			dom.visibility = "hidden"
		}
		else {
			dom.visibility = "visible"
		} 
}	
	
// this script hides/shows layers based on user event

function toggle(currElem) {
	dom = document.getElementById(currElem).style;
	state = dom.visibility;
	if (state == "visible") {
		dom.visibility = "hidden"
	}
	else {
		dom.visibility = "visible"
	} 
}

// toggleVis script
// this script hides/shows layers based on user event

function toggleVis(currElem) {
	dom = document.getElementById(currElem).style;
	state = dom.visibility;
	if (state == "visible") {
		dom.visibility = "hidden"
	}
	else {
		dom.visibility = "visible"
	} 
}
	
// flip images on mouse over only
function hover(imgName,newImg) {
	if(document.images) {
		document[imgName].src = eval(newImg + ".src")
	}
}