isNS = (navigator.appName == "Netscape");isIE = (navigator.appName == "Microsoft Internet Explorer");navversion = parseInt(navigator.appVersion);if ((isIE) && ((navversion == 4) || (navversion == 5))){	var pattern = /5/g;	if (pattern.test(navigator.appVersion)){		isIE5 = 1;		isIE4 = 0;		}	else 	{		isIE4 = 1;		}	}else	{	isIE4 = 0;	}function hideLayer(layerName){	if (!(layerName)) { return; }	if ((isNS) && (navversion < 5)){		eval('document.layers[layerName + "Layer"].visibility="hide"');	}	else if ((isNS) && (navversion >=5)){                document.getElementById([layerName + "Div"]).style.visibility='hidden';	}	else { 		eval('document.all[layerName + "Div"].style.visibility="hidden"');			}}	function showLayer(layerName){	if (!(layerName)) { return; }	if ((isNS) && (navversion < 5)){		eval('document.layers[layerName + "Layer"].visibility="show"');	}	else if ((isNS) && (navversion >=5)){        	document.getElementById([layerName + "Div"]).style.visibility='visible';	}	else {		eval('document.all[layerName + "Div"].style.visibility="visible"');	}}function rollOver(which,state) {	if (document.images) {		document.images[which].src =document.images[which].src.substring(0,document.images[which].src.lastIndexOf('_')) + "_" + state + ".gif";	}}function loadAlternates(suffix,lookFor) {	if (document.images) {		altImages = new Array(document.images.length);		for (var k in altImages) {			if (document.images[k].src.indexOf(lookFor) >= 0) {				altImages[k] = new Image();				altImages[k].src =(document.images[k].src.substring(0,document.images[k].src.lastIndexOf('_')) + "_" + suffix + ".gif");			}		}	}}//additional code needed to support ie4if (isIE4) 	{	theDivs = document.all.tags("div");	}var waiter;function topNav(what, state, no) {	if (isIE4){		clearTimeout(waiter);		topNavCall = "topNav2('" + what + "','" + state + "','" + no + "')";		eval('waiter = setTimeout("' + topNavCall + '",50)');		}	else 	{		topNav2(what, state);		}	}	//loadAlternates('on','off');function topNav2(what,state,no) {		whichMenuLayer = what + "Menu";	whichNavLayer = what + "Nav";	if (state == "on") {		if (isIE4){			for (i=0; i < theDivs.length; i++)			{					theDivs[i].style.visibility = "hidden";			}			}		showLayer(whichMenuLayer);		showLayer(whichNavLayer);//		rollOver(what,state);	}	if (state == "off") {		if ((isIE4) && (no==1)){			//hideLayer(whichMenuLayer);		return;		}		hideLayer(whichMenuLayer);		hideLayer(whichNavLayer);//		rollOver(what,state);	}}