function showLayer(layerName, shadowLayerName) {
    if (document.getElementById) // Netscape 6 and IE 5+
    {
        var targetElement = document.getElementById(layerName);
        targetElement.style.visibility = 'visible';
        targetElement.style.display = 'table';
        
    }
}

function hideLayer(layerName) {
    if (document.getElementById) {
        var targetElement = document.getElementById(layerName);
        targetElement.style.visibility = 'hidden';
        targetElement.style.display = 'none';
    }
}

function openWindow(url, module, width, height) {
    open(url, module, 'left=20,top=20,width=' + width + ',height=' + height + ',status=yes,toolbar=0,resizable=1,scrollbars=1');
}

function openFullWindow(url, module, width, height) {
    open(url, module, 'left=20,top=20,width=' + width + ',height=' + height + ',menubar=0,toolbar=1,resizable=1,scrollbars=1');
}