var flag = false;

if ((navigator.appName.indexOf('Netscape') >= 0 && navigator.appVersion.charAt(0) >= '3') || (navigator.appName.indexOf('Microsoft') >= 0 && navigator.appVersion.charAt(0) >= '4'))

{

flag = true;

img1out = new Image;
img1out.src = "images/btn.gif";
img1over = new Image;
img1over.src = "images/bto.gif";

img2out = new Image;
img2out.src = "images/btn-02.gif";
img2over = new Image;
img2over.src = "images/bto-02.gif";

img3out = new Image;
img3out.src = "images/btn-03.gif";
img3over = new Image;
img3over.src = "images/bto-03.gif";

img4out = new Image;
img4out.src = "images/btn-04.gif";
img4over = new Image;
img4over.src = "images/bto-04.gif";

img5out = new Image;
img5out.src = "images/btn-05.gif";
img5over = new Image;
img5over.src = "images/bto-05.gif";

img6out = new Image;
img6out.src = "images/btn-06.gif";
img6over = new Image;
img6over.src = "images/bto-06.gif";

img7out = new Image;
img7out.src = "images/btn-07.gif";
img7over = new Image;
img7over.src = "images/bto-07.gif";

img8out = new Image;
img8out.src = "images/btn-08.gif";
img8over = new Image;
img8over.src = "images/bto-08.gif";

img9out = new Image;
img9out.src = "images/btn-09.gif";
img9over = new Image;
img9over.src = "images/bto-09.gif";

img10out = new Image;
img10out.src = "images/btn-10.gif";
img10over = new Image;
img10over.src = "images/bto-10.gif";

img11out = new Image;
img11out.src = "images/btn-11.gif";
img11over = new Image;
img11over.src = "images/bto-11.gif";

img12out = new Image;
img12out.src = "images/btn-12.gif";
img12over = new Image;
img12over.src = "images/bto-12.gif";

img13out = new Image;
img13out.src = "images/btn-13.gif";
img13over = new Image;
img13over.src = "images/bto-13.gif";

img14out = new Image;
img14out.src = "images/btn-14.gif";
img14over = new Image;
img14over.src = "images/bto-14.gif";

img15out = new Image;
img15out.src = "images/btn-15.gif";
img15over = new Image;
img15over.src = "images/bto-15.gif";

img16out = new Image;
img16out.src = "images/btn-16.gif";
img16over = new Image;
img16over.src = "images/bto-16.gif";

img17out = new Image;
img17out.src = "images/btn-17.gif";
img17over = new Image;
img17over.src = "images/bto-17.gif";

img18out = new Image;
img18out.src = "images/btn-18.gif";
img18over = new Image;
img18over.src = "images/bto-18.gif";

}