function SetLoginFormFocus()
{
  if (Boolean(document.getElementById('login_require')))
    document.getElementById('login_require').focus();
}

function SetPreviewProductImg(iProductId, sImageId)
{
  product_show = document.getElementById('ImageContener');
  product_show.onclick = function() { ShowProductImg(iProductId,sImageId) };

  product_preview = document.getElementById('product_preview');
  product_preview.src = "php/picture.php?iId="+iProductId+"&sImageId="+sImageId+"&sThumb=PROD_IMAGE_THUMB_110";
}