IE5 = (document.all && document.getElementById) ? true : false; 
NS4 = (document.layers) ? true : false; 
NS6 = (document.getElementById && !document.all) ? true : false; 



function killAll(){

if (NS4)
{
document.Layer1.visibility = "hide"
document.Layer2.visibility = "hide"
document.Layer3.visibility = "hide"
}

else if (NS6)

{
document.getElementById("Layer1").style.visibility = "hidden"
document.getElementById("Layer2").style.visibility = "hidden"
document.getElementById("Layer3").style.visibility = "hidden"
}

else if (IE5)
{
Layer1.style.visibility = "hidden"
Layer2.style.visibility = "hidden"
Layer3.style.visibility = "hidden"
}}

function option(x) {

if (NS4)
{
eval ("document.Layer" + x + ".visibility = 'show'")
}

else if (NS6)
{

eval ("document.getElementById('Layer" + x + "').style.visibility = 'visible'")
}

else if (IE5)
{
eval ("Layer" + x + ".style.visibility = 'visible'")
}
}





function swapImage(img_name,img_src,img_lay) {


if ( img_lay == null )

{
img_lay = "0"
}


if ( img_lay == "0")
	{
	document[img_name].src=img_src;
	}
else
	{
	if (document.layers)
		{
		eval('document.Layer' + img_lay + '.document.images["' + img_name + '"].src = "' + img_src + '"');
		}
		else
		{
		document[img_name].src=img_src;
		}
	}
}