var flashinstalled = 0;
var flashversion = 0;
var try_vb = 0;

if (navigator.plugins && navigator.plugins.length)
{
    x = navigator.plugins ["Shockwave Flash"];
    if (x)
    {
        flashinstalled = 1;
        if (x.description)
        {
            y = x.description;
            flashversion = y.charAt (y.indexOf ('.') - 1);
        }
    }

    x = navigator.plugins ["Shockwave Flash 2.0"];
    if (x)
    {
        flashinstalled = 1;
        flashversion = 2;
    }
}
else if (navigator.mimeTypes && navigator.mimeTypes.length)
{
    x = navigator.mimeTypes ['application/x-shockwave-flash'];
    if (x && x.enabledPlugin)
        flashinstalled = 1;
}
else
    try_vb = 1;