var      compat = "false"
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVer >= 3) compat = "true";
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) compat = "true";

var     nRollOverFlag = 0;
var     nTotalImages = 0;

if (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 3 ))
|| ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 ))) 
	{
	nRollOverFlag = 1;
	var ImageName = new Array();
	var ImageArray = new Array();
	}

function AddImageCache(sImageName, sImageURL) {
        if (!nRollOverFlag) return(-2);
        ImageName[nTotalImages] = sImageName;
        ImageArray[nTotalImages] = new Image();
        ImageArray[nTotalImages].src = sImageURL;
        nTotalImages += 1;
        return(0);
    }
	
function FindImage(sImageName) {
   if (!nRollOverFlag) return(-2);
        var nTemp = 0;
        var nFound = -1;
        while (nTemp < nTotalImages) {
                if (ImageName[nTemp] == sImageName) {
                        nFound = nTemp;
                        break;                          
                        }
                nTemp += 1;
                }
        return(nFound);
        }
		
function swapimage(xobject, sImageName) {
        if (!nRollOverFlag) return(-2);
        var nImageIndex = -1;
        nImageIndex = FindImage(sImageName);
        if (nImageIndex >= 0) {
                document.images[xobject].src = ImageArray[nImageIndex].src;
                }
        return(0);
        }
		
if (nRollOverFlag) {

   AddImageCache("bottom_off", "bottom.gif");
   AddImageCache("bottom", "bottom_on.gif");
} 
	
function unhide(layerNumber)
	{
	if (browserName == "Netscape" && browserVer == 4)
	{hideAllNS();
	document.layers["it" + layerNumber + "Sub"].visibility = "show";}
	
	else if (browserName == "Microsoft Internet Explorer" && browserVer == 4)
	{	hideAll();
	    var subMenuID = document.all["it" + layerNumber + "Sub"];

  		if (subMenuID.style.visibility != "visible")
		{
	  		subMenuID.style.visibility = "visible";
		}
	}
	
	else{
	hideAll();
	var myElement = document.getElementById("it" + layerNumber + "Sub");
	myElement.style.visibility = "visible"; }
	}
	
	
function hideAll()
	{
	if (browserName == "Netscape" && browserVer == 4)
		{	
		hideAllNS();
		}
	else
		{
		hideAllIE();
		}
	}
	
function hideAllNS()
	{
	for (i = 1; i <= 32; i++)
	    {
		document.layers["it" + i + "Sub"].visibility = "hide";
    	}	
	}
	
function hideAllIE()
	{
	for (i = 1; i <= 32; i++)
		if (browserName == "Microsoft Internet Explorer" && browserVer == 4)
		{ document.all["it" + i + "Sub"].style.visibility = "hidden";}
		else
		{
				var myElement = document.getElementById("it" + i + "Sub");
				myElement.style.visibility = "hidden"; 
		}}