function SetPageSize()
{
    var _panelHeight;

    if (document.getElementById("tabContent") != null && document.getElementById("header") != null && document.getElementById("footer") != null)
    {
        if (parseInt(document.documentElement.clientHeight) > parseInt(document.getElementById("tabContent").offsetHeight) &&
            parseInt(document.documentElement.clientHeight) - parseInt(document.getElementById("tabContent").offsetHeight) > 1)
        {
            _panelHeight = parseInt((parseInt(document.documentElement.clientHeight) - parseInt(document.getElementById("tabContent").offsetHeight)) / 2);
            document.getElementById("header").style.height = _panelHeight + "px";
            document.getElementById("footer").style.height = _panelHeight + "px";
        }
    }
}