//initialization, browser, os detection
var d, dom, nu='', brow='', ie, ie4, ie5, ie5x, ie6, ie7;
var ns4, moz, moz_rv_sub, release_date='', moz_brow, moz_brow_nu='', moz_brow_nu_sub='', rv_full=''; 
var mac, win, old, lin, ie5mac, ie5xwin, konq, saf, op, op4, op5, op6, op7;

d=document;
n=navigator;
nav=n.appVersion;
nan=n.appName;
nua=n.userAgent;
old=(nav.substring(0,1)<4);
mac=(nav.indexOf('Mac')!=-1);
win=( ( (nav.indexOf('Win')!=-1) || (nav.indexOf('NT')!=-1) ) && !mac)?true:false;
lin=(nua.indexOf('Linux')!=-1);
// begin primary dom/ns4 test
// this is the most important test on the page
if ( !document.layers )
{
	dom = ( d.getElementById ) ? d.getElementById : false;
}
else { 
	dom = false; 
	ns4 = true;// only netscape 4 supports document layers
}
// end main dom/ns4 test

op=(nua.indexOf('Opera')!=-1);
saf=(nua.indexOf('Safari')!=-1);
konq=(!saf && (nua.indexOf('Konqueror')!=-1) ) ? true : false;
moz=( (!saf && !konq ) && ( nua.indexOf('Gecko')!=-1 ) ) ? true : false;
ie=((nua.indexOf('MSIE')!=-1)&&!op);