// pri odebrani nebo pridani banneru zmnenit hodnotu bannersNumber //
var bannersNumber = 4;
function over(idHovered)
{
  for (i=1; i<= bannersNumber; i++)
	{
    if (i != idHovered)
		{
		document.getElementById('banner'+i).className='opacity';
		}
	}
}
function out(idHovered)
{
  for (i=1; i<= bannersNumber; i++)
	{
    if (i != idHovered)
		{
		document.getElementById('banner'+i).className='';
		}
	}
}