function hce500_1() {
  if (document.images)
    document.images.img.src = "http://diallog.by/img/modems/huawei_big.jpg" 
}
function hce500_2() {
  if (document.images)
    document.images.img.src = "http://diallog.by/img/modems/hce500.jpg" 
}
function hec506_1() {
  if (document.images)
    document.images.img.src = "http://diallog.by/img/modems/huawei_ec506.jpg" 
}
function hec506_2() {
  if (document.images)
    document.images.img.src = "http://diallog.by/img/modems/huawei_ec5062.jpg" 
}