bName = navigator.appName;
bVer = parseInt (navigator.appVersion);
	if ((bName == "Netscape" && bVer >= 3) ||
		 (bName == "Microsoft Internet Explorer" && bVer >= 4)) br = "n3";
		 else br = "n2";
		 
		 if (br== "n3") {

		 img1on = new Image();
		 img1on.src = "nawi/sg1.gif";

		 img2on = new Image();
		 img2on.src = "nawi/o_firmie1.gif";
		 		 
		 img3on = new Image();
		 img3on.src = "nawi/oferta1.gif";
		 
		 img4on = new Image();
		 img4on.src = "nawi/zapytania1.gif";
		 
		 img5on = new Image();
		 img5on.src = "nawi/kontakt1.gif";

		 img6on = new Image();
		 img6on.src = "nawi/email1.gif";


		 img1off = new Image();
		 img1off.src = "nawi/sg.gif";
	
		 img2off = new Image();
		 img2off.src = "nawi/o_firmie.gif";
		 		 
		 img3off = new Image();
		 img3off.src = "nawi/oferta.gif";
		 
		 img4off = new Image();
		 img4off.src = "nawi/zapytania.gif";
		 
		 img5off = new Image();
		 img5off.src = "nawi/kontakt.gif";

		 img6off = new Image();
		 img6off.src = "nawi/email.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");
		}
	}