var browserType;

    if (document.layers) {browserType = "nn4"}
    if (document.all) {browserType = "ie"}
    if (window.navigator.userAgent.toLowerCase().match("gecko")) {browserType= "gecko"}

    function hide(idecko) {
        if (browserType == "gecko" )
        document.poppedLayer = eval('document.getElementById(idecko)');
        else if (browserType == "ie")
        document.poppedLayer = eval('document.all[idecko]');
        else
        document.poppedLayer = eval('document.layers[idecko]');
        document.poppedLayer.style.display = "none";
    }

    function show(idecko) {
    if (browserType == "gecko" )
        document.poppedLayer = eval('document.getElementById(idecko)');
    else if (browserType == "ie")
        document.poppedLayer = eval('document.all[idecko]');
    else
        document.poppedLayer = eval('document.layers[idecko]');
        document.poppedLayer.style.display = "block";
    }