positionMenu = false;

function switchClass( id, mode ) {
    var domId, nc, bro, obj, broj;
    domId = "zone" + id;
    obj = document.getElementById(domId);
   	but = document.getElementById("but"+id);
    if (mode == '+') {
    	obj.className = "etenduz"+id;
    	but.className = "butm";
    }
    else
    	obj.className = "hidden";
}
    
function deplieHome( num ) {
    var i, opt;
    for ( i = 1; i <= 3; i++ ) {
        opt =  (i == num) ? '+' : '-';
        switchClass( i, opt );
    }
}

function replieHome() {
	var domId, obj, but;
	for (var i=1;i<=3;i++) {
		domId = "zone"+i;
		obj = document.getElementById(domId);
		obj.className = domId;
		but = document.getElementById("but"+i);
		but.className = "butp"+i;
	}
}

function chooseWTD ( id ) {
	if (positionMenu)
		replieHome( id );
	else
		deplieHome( id );
	positionMenu = (positionMenu)? false : true;
}

var detect = navigator.userAgent.toLowerCase();
var OS,browser,total,thestring;
var version = 0;

if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
}
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}