Have you tried checking to see if they are visible?
function hideIt(brands)
{
if(document.getElementById(brands).style.visibility = 'visible')
{
document.getElementById(brands).style.visibility = 'show';
}
}
I prefer
document.getElementById(brands).style.display = 'none';
document.getElementById(brands).style.display = '';
function hideIt(brands)
{
if(document.getElementById(brands).style.visibility = 'visible')
{
document.getElementById(brands).style.visibility = 'show';
}
}
I prefer
document.getElementById(brands).style.display = 'none';
document.getElementById(brands).style.display = '';