var onImgs = new Array();
onImgs['btnnew'] = new Image();
onImgs['btnused'] = new Image();
onImgs['btnrequests'] = new Image();
onImgs['btnpromos'] = new Image();
onImgs['btnservice'] = new Image();
onImgs['btnparts'] = new Image();
onImgs['btncontact'] = new Image();
onImgs['btnnew'].src = '/img/en/bt_home_01_on.gif';
onImgs['btnused'].src = '/img/en/bt_home_02_on.gif';
onImgs['btnrequests'].src = '/img/en/bt_home_03_on.gif';
onImgs['btnpromos'].src = '/img/en/bt_home_04_on.gif';
onImgs['btnservice'].src = '/img/en/bt_home_05_on.gif';
onImgs['btnparts'].src = '/img/en/bt_home_06_on.gif';
onImgs['btncontact'].src = '/img/en/bt_home_07_on.gif';

function imgOn(imgName){
  if (document.images){
    document.images[imgName].style.cursor = 'pointer';
    document.images[imgName].src = onImgs[imgName].src;
  }
}

var offImgs = new Array();
offImgs['btnnew'] = new Image();
offImgs['btnused'] = new Image();
offImgs['btnrequests'] = new Image();
offImgs['btnpromos'] = new Image();
offImgs['btnservice'] = new Image();
offImgs['btnparts'] = new Image();
offImgs['btncontact'] = new Image();
offImgs['btnnew'].src = '/img/en/bt_home_01.gif';
offImgs['btnused'].src = '/img/en/bt_home_02.gif';
offImgs['btnrequests'].src = '/img/en/bt_home_03.gif';
offImgs['btnpromos'].src = '/img/en/bt_home_04.gif';
offImgs['btnservice'].src = '/img/en/bt_home_05.gif';
offImgs['btnparts'].src = '/img/en/bt_home_06.gif';
offImgs['btncontact'].src = '/img/en/bt_home_07.gif';

function imgOff(imgName){
  if (document.images){
    document.images[imgName].style.cursor = 'pointer';
    document.images[imgName].src = offImgs[imgName].src;
  }
}