var browser=navigator.appName;
var platform=navigator.appVersion;
var cssFile="";
var currentStyle="no";
var layerNumToShow=1;
var layerNumShowing=1;
var totalLayersInLoop=1;
var pageNumToShow=1;
var pageNumShowing=1;
var buttonNumToShow=1;
var buttonNumShowing=1;
var lastLayer="";
var layerName="";
var layerStyleRef="layer.";
var layerRef="document.layers";
var 	styleSwitch="";

var is_major = parseInt(navigator.appVersion);
var is_nav4 = ((browser == "Netscape") && (is_major == 4));
var is_nav6up = ((browser == "Netscape") && (is_major >= 5));
if (browser == "Microsoft Internet Explorer") is_ie="true";
if (browser == "Netscape") // this is the Netscape browser sniffer
    	 	{
     		if (navigator.appVersion.indexOf("Macintosh") == -1) 
          		{
          		currentStyle='Windows Netscape';
          		} 
     		else 
          		{
          		currentStyle='Macintosh Netscape';
          		}
     		}
if (browser == "Microsoft Internet Explorer")
     		{
         	if (platform.indexOf("Macintosh") == -1) 
               	{
               	currentStyle='Windows Explorer';
               	} 
          	else 
               	{
               	currentStyle='Macintosh Explorer';
               	}
    	}

function init(number)
	{
	totalLayersInLoop=number;

	if (document.getElementById) {
			layerStyleRef="layer.style.";
			layerRef="document.getElementById"; 
			styleSwitch=".style";
		}
		else if (document.layers) {
		layerStyleRef="layer.";
			layerRef="document.layers";
			styleSwitch="";
		}
	}

function changeLayer(layerName, lastLayer){
	showLayer(layerName);
	if (lastLayer!='') {hideLayer(lastLayer);}
}

function showLayer(layerName){
	if (is_nav4)
	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
	else
	eval(layerRef+'("'+layerName+'")'+styleSwitch+'.visibility="visible"');
}

function hideLayer(layerName){
		if (is_nav4)
		eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
		else
		eval(layerRef+'("'+layerName+'")'+styleSwitch+'.visibility="hidden"');
}

function showMessage(layerName, message) {
	window.status = message;
	return true;
}

function clearMessage(layerName) {
	window.status = " "
	return true
}

function showCat(){
	hideLayer(eval('"layer' + layerNumShowing+'"'));
	showLayer('loopControls');
}

function showLayerNumber(number){
	var layerNumToShow=number;
	hideLayer(eval('"layer' + layerNumShowing+'"'));
	showLayer(eval('"layer' + layerNumToShow+'"'));

	layerNumShowing=layerNumToShow;
	hideLayer('loopControls');
}
function showPreviousLayer(){
	var layerNumToShow=layerNumShowing-1;
	if (layerNumToShow < 1){layerNumToShow=totalLayersInLoop;}
	hideLayer('loopControls');
	hideLayer(eval('"layer' + layerNumShowing+'"'));
	showLayer(eval('"layer' + layerNumToShow+'"'));
	layerNumShowing=layerNumToShow;
}
function showNextLayer(){
	layerNumToShow=layerNumShowing+1;
	if (layerNumToShow > totalLayersInLoop) {layerNumToShow=1; }
	hideLayer('loopControls');
	hideLayer(eval('"layer' + layerNumShowing+'"'));
	showLayer(eval('"layer' + layerNumToShow+'"'));
	layerNumShowing=layerNumToShow;
}

function showPreviousImage(){
	var layerNumToShow=layerNumShowing-1;
	if (layerNumToShow < 1){layerNumToShow=totalLayersInLoop;}
	hideLayer(eval('"image' + layerNumShowing+'"'));
	showLayer(eval('"image' + layerNumToShow+'"'));
	layerNumShowing=layerNumToShow;
}
function showNextImage(){
	layerNumToShow=layerNumShowing+1;
	if (layerNumToShow > totalLayersInLoop) {layerNumToShow=1; }
	hideLayer(eval('"image' + layerNumShowing+'"'));
	showLayer(eval('"image' + layerNumToShow+'"'));
	layerNumShowing=layerNumToShow;
}

 function update(destID, src) {
	if (is_nav4) document.layers[destID].src = src
	else
     	{
       	destFrame = checkIFrame(destID)
       	destFrame.location.href = src        
      	 setTimeout("pollIFrame('"+destID+"')",1000)
     	}       
   }

   function checkIFrame(destID) {
     var iframe = document.frames[destID+"target"]
     if (iframe==null) {
       document.body.insertAdjacentHTML("beforeEnd","<IFRAME STYLE='width: 0pt; height: 0pt' NAME='"+destID+"target' SRC='' ></IFRAME>")
       iframe = document.frames[destID+"target"]
     }
     return iframe
   }

   function pollIFrame(destID) {
     var destFrame = checkIFrame(destID)
     if (destFrame.document.readyState=='complete') {
       document.all[destID].innerHTML = destFrame.document.body.innerHTML
     } else
       setTimeout("pollIFrame('"+destID+"')",500)        
   }

function open_new_win (file, x, y) {
msg=open("","","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width="+x+", height="+y+"");
msg.location = file
}