browsok = (((navigator.appName == "Netscape")
&& (parseInt(navigator.appVersion) >= 3))
|| ((navigator.appName == "Microsoft Internet Explorer")
&& (parseInt(navigator.appVersion)>=3)));
if(browsok){

     home1 = new Image(143, 20);
     home1.src = "h1.gif";
     publ1 = new Image(143, 20);
     publ1.src = "p1.gif";
     books1 = new Image(157, 20);
     books1.src = "b1.gif";
     res1 = new Image(143, 20);
     res1.src = "r1.gif";

     home0 = new Image(143, 20);
     home0.src = "h0.gif";
     publ0 = new Image(143, 20);
     publ0.src = "p0.gif";
     books0 = new Image(157, 20);
     books0.src = "b0.gif";
     res0 = new Image(143, 20);
     res0.src = "r0.gif";

}
function onmouseon(n){
     if(browsok){
          imageON = eval(n + "1.src");
          document [n].src = imageON;
          }
}
function onmouseoff(n){
     if(browsok){
imageOFF = eval(n + "0.src");
     document [n].src = imageOFF;
          }
}
// end