function show(tab)
{
    i = 1;
    while (document.getElementById("m_" + i))
    {
        document.getElementById("m_" + i).style.display = 'none';
        i++;
    }
    document.getElementById(tab).style.display = 'block';
}
function subshow(st)
{
    i = 1;
    while (document.getElementById("s_" + i))
    {
        document.getElementById("s_" + i).style.display = 'none';
        i++;
    }
    document.getElementById(st).style.display = 'block';
}


function hide(tab)
{
    document.getElementById(tab).style.display = 'none';
}

function onmuschng(imgNm, imgSrc)
{
    document[imgNm].src = '../images/' + imgSrc;
}

function setLeftMenuSelected(menuItemID)
{
    try
    {
        document.getElementById(menuItemID).style.background = '#96CE7D';
        document.getElementById(menuItemID).style.color = '#000000';

        fixH('leftcolumn', 'rightcolumn');
        fixH2('left', 'right', 'centre');
    }

    catch (e)
    {
        debugger;
    }
}