function changeTop(showLayer)
{
    document.getElementById(showLayer).style.display="block";
    
    if(showLayer!='top_home')
    {
        document.getElementById('top_home').style.display="none";
    }
    if(showLayer!='top_tillSalu')
    {
        document.getElementById('top_tillSalu').style.display="none";
    }
    if(showLayer!='top_service')
    {
        document.getElementById('top_service').style.display="none";
    }
}