ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false

function printIt(){
 if (!window.print) {
  alert("Aby wydrukować tą stronę kliknij prawym klawiszem i wybierz - Drukuj");
  return
 }
 window.print()
}

function expand() {
  resizeTo(600,400);
}

// otwiera nowe okienko na srodku ekranu
function openwin(mypage, myname, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable=no'
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

// produkt popup
function popup(produkt) {
	var w = 538;
	var h = 425;
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	url = 'popup.php?f='+produkt;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars=no';
	var win = window.open(url,'win',winprops);
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

// produkt popup z opisem
function popup_opis(produkt) {
	var w = 538;
	var h = 500;
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	url = 'popup_opis.php?f='+produkt;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars=no';
	var win = window.open(url,'win',winprops);
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}