bName = navigator.appName;
bVer = parseInt(navigator.appVersion);
if ((bName == "Netscape" && bVer >= 3) || (bName == "Microsoft Internet Explorer" && bVer >= 3)) 
	br = "n3"; 
else 
	br = "n2";

if (br== "n3") 
{ 
	img1on = new Image();                       
	img1on.src = "graphics/zoomin.gif";                

	img1off = new Image();                       
	img1off.src = "graphics/zoom.gif";               
}

function imgAct(imgName) 
{
    if (br == "n3") 
	{
		document[imgName].src = eval(imgName + "on.src");
    }
}

function imgInact(imgName) 
{
    if (br == "n3") 
	{
		document[imgName].src = eval(imgName + "off.src");
    }
}

function pop(url,width,height) {
	var pop = window.open(url, 'pop', 'height='+height+',width='+width+',resizable=no,status=no,scrolling=no');
	if (pop.focus) {
		pop.focus();
	}
}