function ShowTower()
{
    // check to see if it's worth doin'
    if (document.body.clientWidth > 900) //1000
    {
        // move the right add, position it relative to the main content table then unhide it
        document.getElementById('dvtower').style.display="block";
        document.getElementById('dvtower').style.left = document.getElementById('runway').offsetWidth + document.getElementById('runway').offsetLeft + 4 + "px";
        document.getElementById('dvtower').style.top = document.getElementById('FlashHeader').offsetTop + "px";
        document.getElementById('dvtower').style.visibility = "visible";        
    }  
}