<!--

var tisNS4 = document.layers ? 1 : 0;
var tisIE4 = document.all ? 1 : 0;
var tua = navigator.userAgent.toLowerCase();
var tisMAC = (tua.indexOf("mac") != -1);
var tisW3C = document.getElementById ? 1 : 0;

function showIt(id){
	if (tisNS4) {
		eval("document."+id+".visibility = 'show'");
	} else if (tisIE4) {
		eval("document.all."+id+".style.visibility = 'visible'");
	} else if (tisW3C) {
		eval("document.getElementById('"+id+"').style.visibility = 'visible'");
	}
}
function hideAll(){
	for(i=1;i<=4;i++){
		if (tisNS4) {
			eval("document.roll"+i+".visibility = 'hide'");
		} else if (tisIE4) {
			eval("document.all.roll"+i+".style.visibility = 'hidden'");
		} else if (tisW3C) {
			eval("document.getElementById('roll"+i+"').style.visibility = 'hidden'");
		}
	}
	if (tisNS4) {
		document.rollATW.visibility = 'hide';
		document.rollWHC.visibility = 'hide';
	} else if (tisIE4) {
		document.all.rollATW.style.visibility = 'hidden';
		document.all.rollWHC.style.visibility = 'hidden';
	} else if (tisW3C) {
		document.getElementById('rollATW').style.visibility = 'hidden';
		document.getElementById('rollWHC').style.visibility = 'hidden';
	}
}

//-->