//variable intialization. All Date/Time variables initialized by null.
var tStart = null;

function hideMenu01()//auto hiding the layers by settimeout
	{
		//getting the value
		tStart = setTimeout('hideMenu02();', 1000);
	}
function showMenu1()//showing the layers
	{	
		//clearing the value
		clearTimeout(tStart);
		document.getElementById('sec1').style.visibility ="visible"; 
	}
function showMenu2()//showing the layers
	{	
		//clearing the value
		clearTimeout(tStart);
		document.getElementById('sec2').style.visibility ="visible"; 
	}
function showMenu3()//showing the layers
	{	
		//clearing the value
		clearTimeout(tStart);
		document.getElementById('sec3').style.visibility ="visible"; 
	}

function hideMenu01() //hiding the layers
	{
		document.getElementById('sec1').style.visibility ="hidden"; 
	}
function hideMenu02() //hiding the layers
	{
		document.getElementById('sec2').style.visibility ="hidden"; 
	}
function hideMenu03() //hiding the layers
	{
		document.getElementById('sec3').style.visibility ="hidden"; 
	}
function rollOverImage(id, clsName)
	{
			document.getElementById(id).className = clsName;
	}