var item1State = true;
var item2State = true;
var item3State = true;
if (document.images)
{
	var imglist = new Array (
	"images/nav_btn_1_1.gif"
,	"images/nav_btn_2_1.gif"
, 	"images/nav_btn_3_1.gif"
, 	"images/nav_btn_4_1.gif"
, 	"images/nav_btn_5_1.gif"
, 	"images/nav_btn_6_1.gif"
, 	"images/nav_btn_7_1.gif"
);
 
	var imgs = new Array(); var count;
 	for (count=0; count<imglist.length; count++)
 	{
 		imgs[count]=new Image(); imgs[count].src=imglist[count];
 	}
}

function hilite(name,m)
{
	if ((!(document.all)) && (!(document.layers)))
	{
		imgswap(name, imgs[m])
 	}
	else if (document.images)
 	{
		imgswap(name, imgs[m])
 	}
}

function imgswap(i1,i2)
{
	if ((!(document.all)) && (!(document.layers)))
	{
		var temp = i1.src; i1.src=i2.src; i2.src=temp;
 	}
	else if (document.images)
 	{
		var temp = i1.src; i1.src=i2.src; i2.src=temp;
	}
}

function showItem(itemNo)
{
 			if(itemNo == 1)
 			{
 				if(item1State == true)
 				{
					document.getElementById('NavExp1').style.display="inline";
					document.getElementById('NavExp2').style.display="none";
					document.getElementById('NavExp3').style.display="none";
					item1State = false;
					item2State = true;
					item3State = true;
				}
				else
				{
					document.getElementById('NavExp1').style.display="none";
					document.getElementById('NavExp2').style.display="none";
					document.getElementById('NavExp3').style.display="none";
					item1State = true;
					item2State = true;
					item3State = true;
				}
			}
			else if(itemNo == 2)
 			{
 				if(item2State == true)
 				{
					document.getElementById('NavExp1').style.display="none";
					document.getElementById('NavExp2').style.display="inline";
					document.getElementById('NavExp3').style.display="none";
					item2State = false;
					item1State = true;
					item3State = true;
				}
				else
				{
					document.getElementById('NavExp1').style.display="none";
					document.getElementById('NavExp2').style.display="none";
					document.getElementById('NavExp3').style.display="none";
					item2State = true;
					item3State = true;
					item1State = true;
				}
			}
			else
			{
				if(item3State == true)
 				{
					document.getElementById('NavExp1').style.display="none";
					document.getElementById('NavExp2').style.display="none";
					document.getElementById('NavExp3').style.display="inline";	
					item3State = false;
					item2State = true;
					item1State = true;
				}
				else
				{
					document.getElementById('NavExp1').style.display="none";
					document.getElementById('NavExp2').style.display="none";
					document.getElementById('NavExp3').style.display="none";
					item3State = true;
					item2State = true;
					item1State = true;
				}
			}
}