function visible(object, x)
{object.className='vis';
object.style.position='absolute';
coord_x=(document.body.clientWidth-720)/2+x;
object.style.left=coord_x+89;
object.style.top='109';
}

function hidden(object)
{object.className='hid';
}

prev='document.all.doors';

function change(object)
{prev.className='hid';
object.className='vis_light';
prev=object}

function vis(arg)
{document.all[arg].className='a100';
}

function alfa(arg)
{document.all[arg].className='a50';
}