var activeTNav,activeTNavObj;
var timeoutTNav;
function showPopup(id)
{
    clearAllPopups();
    clearTimeout(timeoutTNav);
    activeTNav = id;
    activeTNavObj = (document.layers)?document[activeTNav]:document.all?document.all[activeTNav]:document.getElementById(activeTNav);
    
    activeTNavObj.style.display = "block";
}

function hidePopup()
{
    timeoutTNav = setTimeout("hidePopupNow()",750);
}

function hidePopupNow()
{
    activeTNavObj.style.display = "none";
}

function clearAllPopups()
{
    var TNav = "tnav1";
    var TNavObj = (document.layers)?document[TNav]:document.all?document.all[TNav]:document.getElementById(TNav);
    TNavObj.style.display = "none";
    
    var TNav = "tnav2";
    var TNavObj = (document.layers)?document[TNav]:document.all?document.all[TNav]:document.getElementById(TNav);
    TNavObj.style.display = "none";
    
    var TNav = "tnav5";
    var TNavObj = (document.layers)?document[TNav]:document.all?document.all[TNav]:document.getElementById(TNav);
    TNavObj.style.display = "none";
}