function fixH(one, two)
{
    if (document.getElementById(one))
    {
        var lh = document.getElementById(one).offsetHeight;
        var rh = document.getElementById(two).offsetHeight;
        var nh = Math.max(lh, rh);
        document.getElementById(one).style.height = nh + "px";
        document.getElementById(two).style.height = nh + "px";
    }
}

//this does it for three
function sortNum(a, b) { return b - a }
function fixH2(one, two, three)
{
    if (document.getElementById(one))
    {
        var obj = new Array(3);
        var option = [one, two, three];
        for (var i = 0; i < option.length; i++)
        {
            document.getElementById(option[i]).style.height = "auto";
            obj[i] = document.getElementById(option[i]).offsetHeight;
            nh = obj.sort(sortNum);
        }
        nh1 = nh.splice(1, 2);
        for (var i = 0; i < option.length; i++)
        {
            document.getElementById(option[i]).style.height = nh + "px";
        }
    }
}
//


window.onload = function()
{
    fixH('leftcolumn', 'rightcolumn');
    fixH2('left', 'right', 'centre');
}