ns4 = (document.layers) ? true : false
ie4 = (document.all) ? true : false

function init() {
    if (ns4) block = document.blockDiv
    if (ie4) block = blockDiv.style
}

// Show/Hide functions for pointer objects

function showObject(obj) {
    if (ns4) document.obj.visibility = "show"
    else if (ie4) obj.style.visibility = "visible"
}

function hideObject(obj) {
    if (ns4) document.obj.visibility = "hide"
    else if (ie4) obj.style.visibility = "hidden"
}