browserName = navigator.appName;
        browserVer = parseInt(navigator.appVersion);
                browserOK = 0;
        if ((browserName == "Netscape" && browserVer >= 3) ||
                    (browserName == "Microsoft Internet Explorer" && browserVer >"3")) browserOK = 1;

        if (browserOK) {
	
        	
		ofirmie = new Image();
                ofirmie.src = "ofirmie.gif";
                ofirmie_over = new Image();
                ofirmie_over.src = "ofirmie1.gif";
	
               
        kontakt = new Image();
                kontakt.src = "kontakt.gif";
                kontakt_over = new Image();
                kontakt_over.src = "kontakt1.gif";

        oferta = new Image();
                oferta.src = "oferta.gif";
                oferta_over = new Image();
                oferta_over.src = "oferta1.gif";
				
		promocja = new Image();
                promocja.src = "k-promocja.gif";
                promocja_over = new Image();
                promocja_over.src = "k-promocja1.gif";
				
		   ksiega = new Image();
                ksiega.src = "k-ksiega.gif";
                ksiega_over = new Image();
                ksiega_over.src = "k-ksiega1.gif";   		
				
			nowosc = new Image();
                nowosc.src = "k-nowosc.gif";
                nowosc_over = new Image();
                nowosc_over.src = "k-nowosci1.gif";   		
				
				certyfikat = new Image();
                certyfikat.src = "k-cert.gif";
                certyfikat_over = new Image();
                certyfikat_over.src = "k-cert1.gif";   	
                
              katalogi = new Image();
                katalogi.src = "k-katalogi1.gif";
                katalogi_over = new Image();
                katalogi_over.src = "k-katalogi.gif";   					
		
              }

        function img_over(imgName) {
       if (browserOK) {
                url_imgOver = eval(imgName + "_over.src");
                document [imgName].src = url_imgOver;
          }
                 }
        function img_out(imgName) {
          if (browserOK) {
                url_imgOut = eval(imgName + ".src");
                document [imgName].src = url_imgOut;
        }
      }