if (document.images) {
// картинки после наведения курсора
 img1on = new Image();
 img1on.src = "/images/b0_about.gif";
 img2on = new Image();
 img2on.src = "/images/b0_serv.gif";
 img3on = new Image();
 img3on.src = "/images/b0_price.gif";
 img4on = new Image();
 img4on.src = "/images/b0_supp.gif";
 img5on = new Image();
 img5on.src = "/images/b0_forum.gif";
 img6on = new Image();
 img6on.src = "/images/b0_contacts.gif";
// картинки после отведения курсора
 img1off = new Image();
 img1off.src = "/images/b1_about.gif";
 img2off = new Image();
 img2off.src = "/images/b1_serv.gif";
 img3off = new Image();
 img3off.src = "/images/b1_price.gif";
 img4off = new Image();
 img4off.src = "/images/b1_supp.gif";
 img5off = new Image();
 img5off.src = "/images/b1_forum.gif";
 img6off = new Image();
 img6off.src = "/images/b1_contacts.gif";
}

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

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