browserName = navigator.appName;
     browserVer = parseInt(navigator.appVersion);
          if (browserName == "Netscape" && browserVer >= 3) version = "n3";
            else version = "n3";
          if (version == "n3") {
             			igor1on = new Image();
             igor1on.src = "img/navigation/links/about_on.gif";         
             igor1off = new Image();
             igor1off.src = "img/navigation/links/about_out.gif"; 
                	   igor2on = new Image();
             igor2on.src = "img/navigation/links/projects_on.gif";         
             igor2off = new Image();
             igor2off.src = "img/navigation/links/projects_out.gif"; 
	  	   				igor3on = new Image();
             igor3on.src = "img/navigation/links/contact_on.gif";         
             igor3off = new Image();
             igor3off.src = "img/navigation/links/contact_out.gif";
			 
	  	   			            
                  
                 }

     function img_act(imgName) {

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

     }


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

     }