var NS4 = (document.layers) ? 1 : 0;
var IE4 = (document.all) ? 1 : 0;
var DOM = ((document.getElementById) && (!IE4)) ? 1 : 0;
var MAC = (( navigator.appVersion.indexOf("PPC")>0) || (navigator.appVersion.indexOf("Mac")>0)) ? 1 : 0;
var OPERA = (navigator.appName.indexOf("Opera")>=0) ? 1 : 0;
var globalPulldown = 0;
function ShowLayer() { return; };
function OutLayer() { return; };
if (document.layers) {
        appVer = navigator.appVersion.substring(0,4);
        if (appVer < 4.06) NS4 = 0;
}
//if ( ( IE4 || DOM ) && !OPERA ) globalPulldown = 1;
if ( IE4 || DOM ) globalPulldown = 1;
if (!globalPulldown) event = null;