// JavaScript Document

//global variables

var timerID = null;
var timerOn = false;
var timecount = 5000;
/* ---------------- SET FIRST DISPLAY DIV ---------------- */
function setcurrent()
{
	var currentpage = document.getElementById("layer4");
	currentpage.style.display="block";
	
}


function initnav()
{
	setcurrent();
}
/* ---------------- SET FIRST DISPLAY DIV END---------------- */
// show or hide the layers
	function showLayer(layerName)
	{
		document.getElementById(layerName).style.display="block";
	}

	function hideLayer(layerName)
	{
		document.getElementById(layerName).style.display="none";
	}

function hideAll()
{
	hideLayer('layer1');
	hideLayer('layer2');
	hideLayer('layer3');
	hideLayer('layer4');
	hideLayer('layer5');
	
	
}

function hideAllButLayer4()
{
    hideLayer('layer1');
	hideLayer('layer2');
	hideLayer('layer3');
	showLayer('layer4');
	hideLayer('layer5');
}

function startTime() 
{
	if (timerOn == false) 
	{
	timerID=setTimeout( "hideAllButLayer4()" , timecount);
	timerOn = true;
	}
}

function stopTime() 
{
	if (timerOn) 
	{
		clearTimeout(timerID);
		timerID = null;
		timerOn = false;
	}
}