var ns4 = (document.layers);
var ie4 = (document.all && !document.getElementById);
var ie5 = (document.all && document.getElementById);
var ns6 = (!document.all && document.getElementById);

// SWITCHES TABS
function switchTab(tagID)
{
	allOff();
	
	if(ns4)
	{
		document.layers[tagID].className = "over";
		document.layers["pnl" + tagID].visibility = "show"	
	}
	// Explorer 4
	else if(ie4)
	{
		document.all[tagID].className = "over";
		document.all["pnl" + tagID].style.visibility = "visible";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6)
	{	
		document.getElementById(tagID).className = "over";
		document.getElementById("pnl" + tagID).style.visibility = "visible"
	}
}

function allOff()
{
	if(ns4)
	{
		document.layers["one"].className = "out";
		document.layers["two"].className = "out";
		document.layers["three"].className = "out";
		document.layers["four"].className = "out";
		document.layers["pnlone"].visibility = "hide"
		document.layers["pnltwo"].visibility = "hide"	
		document.layers["pnlthree"].visibility = "hide"	
		document.layers["pnlfour"].visibility = "hide"			
	}
	// Explorer 4
	else if(ie4)
	{
		document.all["one"].className = "out";
		document.all["two"].className = "out";
		document.all["three"].className = "out";
		document.all["four"].className = "out";
		document.all["pnlone"].style.visibility = "hidden";
		document.all["pnltwo"].style.visibility = "hidden";
		document.all["pnlthree"].style.visibility = "hidden";
		document.all["pnlfour"].style.visibility = "hidden";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6)
	{
		document.getElementById('one').className = "out";
		document.getElementById('two').className = "out";
		document.getElementById('three').className = "out";
		document.getElementById('four').className = "out";
		document.getElementById("pnlone").style.visibility = "hidden"
		document.getElementById("pnltwo").style.visibility = "hidden"
		document.getElementById("pnlthree").style.visibility = "hidden"
		document.getElementById("pnlfour").style.visibility = "hidden"
	}
}