function toggleShowHide(obj)
{
    if(document.getElementById(obj).style.display == 'none')
    {
        show(obj);
    }
    else
    {
        hide(obj);
    }
}
function hide(obj) 
{
    document.getElementById(obj).style.display = 'none';
    document.getElementById(obj).style.visibility = 'hidden';
}
function show(obj) 
{
    document.getElementById(obj).style.display = 'block';
    document.getElementById(obj).style.visibility = 'visible';
}