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";
				
				drukuj = new Image();
                drukuj.src = "image/drukuj.gif";
                drukuj_over = new Image();
                drukuj_over.src = "image/drukuj_over.gif";
								
				polecam = new Image();
                polecam.src = "image/polecam.gif";
                polecam_over = new Image();
                polecam_over.src = "image/polecam_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;
        }
	    }