var visible = "hidden";
    var browserType;

function toggleDiv(divname) 
{

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


    if (browserType == "gecko" )
        document.poppedLayer = eval("document.getElementById(divname)");
    else if (browserType == "ie")
        document.poppedLayer = eval("document.all[divname]");
    else
        document.poppedLayer = eval("document.layers[divname]");

    if(visible == "hidden")
    {
        visible = "visible";
        document.poppedLayer.style.display = "block";
    }
    else
    {
        visible = "hidden";
        document.poppedLayer.style.display = "none";
    }
}
function openSustain(divname) 
{

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


    if (browserType == "ie")
        document.poppedLayer = eval("document.all[divname]");

        if(visible == "hidden")
    {
        visible = "visible";
        document.poppedLayer.style.display = "block";
    }
}

function closeSustain(divname) 
{

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


    if (browserType == "ie")
        document.poppedLayer = eval("document.all[divname]");

        visible = "hidden";
        document.poppedLayer.style.display = "none";
}