var isWin = false;
var isIE=false;
var nu = navigator.userAgent;
if (nu.indexOf("Win")!=-1){isWin=true;}
if ((nu.indexOf("MSIE")!=-1)&&(nu.indexOf("Opera")==-1)) isIE=true;
var ieMajor=isIE?parseInt(nu.slice(nu.indexOf("MSIE")+4)):0;
var isIE4up=ieMajor>=4;
var isIE5up=ieMajor>=5;

function setBookmark() {		
	window.external.AddFavorite(location.href,document.title);
}

function openPopup(url,w,h,features) {
	var newWindow = window.open(url, 'popup', 'width='+w+',height='+h+','+features ); 
	newWindow.focus();
}

function googleValues() {
	var f = document.google;
	if(f.c.value =="--Miasto--") f.c.value="";
	f.q.value = "phonebook:" + f.n.value + " " + f.c.value + " " + f.s.value;
}
function selectRandom(max) {
	var r = Math.random()
	r *= max
	r = parseInt(r)
	if(isNaN(r)) r = 0
	else r %= max
	return r+1
}

function chkLength(obj, nMax){
	sTxt = obj.value
	if (sTxt.length>nMax) {
		alert("Dlugosc tekstu nie moze przekroczyc "+nMax+" znakow.")
		obj.value =sTxt = sTxt.substr(0,nMax)
	}
}