function autoresize ()
{
    var IE = document.all?true:false
    if(IE)
    {
        var theheight = document.body.clientHeight;
        var thewidth = document.body.clientWidth;
    }
    else
    {
        var theheight = window.innerHeight;
        var thewidth = window.innerWidth;
    }
    document.getElementById('spacer').style.width = eval((thewidth - 700)/2)+'px';
    document.getElementById('content').style.height = eval(theheight - 215)+'px';
}

function showTopBg(no)
{
  document.getElementById('menu_top_element_'+no).style.display='block';
}
function hideTopBg(no)
{
  document.getElementById('menu_top_element_'+no).style.display='none';
}