browserName = navigator.appName;
        browserVer = parseInt(navigator.appVersion);
                browserOK = 0;

        if ((browserName == "Netscape" && browserVer >= 3) ||
                    (browserName == "Microsoft Internet Explorer" && browserVer >= 3)) browserOK = 1;

        if (browserOK) {
		
				powrot = new Image();
                powrot.src = "image/powrot.gif";
                powrot_over = new Image();
                powrot_over.src = "image/powrot_over.gif";
				
				gora = new Image();
                gora.src = "image/gora.gif";
                gora_over = new Image();
                gora_over.src = "image/gora_over.gif";
				
				home = new Image();
                home.src = "image/home.gif";
                home_over = new Image();
                home_over.src = "image/home_over.gif";
				
				oferta = new Image();
                oferta.src = "image/oferta.gif";
                oferta_over = new Image();
                oferta_over.src = "image/oferta_over.gif";
				
				referencje = new Image();
                referencje.src = "image/referencje.gif";
                referencje_over = new Image();
                referencje_over.src = "image/referencje_over.gif";

				kontakt = new Image();
                kontakt.src = "image/kontakt.gif";
                kontakt_over = new Image();
                kontakt_over.src = "image/kontakt_over.gif";
				
				
				oferta2 = new Image();
                oferta2.src = "image/oferta2.gif";
                oferta2_over = new Image();
                oferta2_over.src = "image/oferta2_over.gif";
				
				referencje2 = new Image();
                referencje2.src = "image/referencje2.gif";
                referencje2_over = new Image();
                referencje2_over.src = "image/referencje2_over.gif";

	
				kontakt2 = new Image();
                kontakt2.src = "image/kontakt2.gif";
                kontakt2_over = new Image();
                kontakt2_over.src = "image/kontakt2_over.gif";
				

			
	  }

        function img_Click(imgName) {
       if (browserOK) {
                url_imgClick = eval(imgName + ".src");
                document [imgName].src = url_imgClick;
          }
		  }
        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;
        }
	    }