function getItem(id)
{
var itm = false;
if(document.getElementById)
    itm = document.getElementById(id);
else if(document.all)
    itm = document.all[id];
else if(document.layers)
    itm = document.layers[id];

return itm;
}

function toggleItem(id)
{
itm = getItem(id);

if(!itm)
    return false;

if(itm.style.display == 'none')
    itm.style.display = '';
else
    itm.style.display = 'none';

return false;
}