browserName=navigator.appName;
browserVer=parseInt(navigator.appVersion);

if ((browserName=="Netscape" && browserVer>=3) || (browserName=="Microsoft Internet Explorer" && browserVer>=4))
	version="n3";
else
	version="n2";

if (version=="n3")
	{
		pic1on= new Image(1,1);
		pic1on.src="../../ytr345albfts/679icns03albz/seta_onesq.gif";
		pic2on= new Image(1,1);
		pic2on.src="../../ytr345albfts/679icns03albz/seta_ondta.gif";
		pic3on= new Image(1,1);
		pic3on.src="../../ytr345albfts/679icns03albz/seta_ontop.gif";
		pic12on= new Image(1,1);
		pic12on.src="../../ytr345albfts/679icns03albz/albz_topo_on.JPG";

		
		pic1off= new Image(1,1);
		pic1off.src="../../ytr345albfts/679icns03albz/setaesq.gif";
		pic2off= new Image(1,1);
		pic2off.src="../../ytr345albfts/679icns03albz/setadta.gif";
		pic3off= new Image(1,1);
		pic3off.src="../../ytr345albfts/679icns03albz/setatop.gif";
		pic12off= new Image(1,1);
		pic12off.src="../../ytr345albfts/679icns03albz/albz_topo.JPG";
				

	}

function lightup(imgName)
	{
		if (version=="n3")
			{
				imgOn=eval (imgName + "on.src");
				document[imgName].src= imgOn;
			}
	}		

function turnoff(imgName)
	{
		if (version=="n3")
			{
				imgOff=eval (imgName + "off.src");
				document[imgName].src= imgOff;
			}
	}