var isMsie=(navigator.appVersion.indexOf("MSIE") == -1) ? false : true;

var imgact = 'visible';
function flipimg() {
	if(!isMsie) return;
	if(!document.all.banimg) return;
	if(imgact == 'visible') imgact = 'hidden'; else imgact = 'visible'
	document.all.banimg.style.visibility = imgact;
	setTimeout('flipimg()', 1000);
};

function testemail(f) {
	if(f.email.value == "") { alert("Prosze podac adres e-mail"); return false; };
	var posat = f.email.value.indexOf('@');
	var posdot = f.email.value.indexOf('.');
	var possp = f.email.value.indexOf(' ');
	var lastch = f.email.value.length-1;
	if((posat <= 0) || (posat == lastch) || (posdot < 0) || (posdot == lastch) || (possp >= 0)) { alert("Prosze poprawic adres e-mail"); return false; };
	return true;
};

function subscribe(f) {
	return testemail(f);
};

function popimg(addrurl, x, y) {
	var wnd = window.open(addrurl, '','toolbar=0, scrollbars=0, resizable=0, status=0, width='+(x+30)+', height='+(y+30)+', left='+parseInt((screen.width-x-30)/2)+', top='+parseInt((screen.height-y-40)/2) );
	return false;
};

function poppage(addrurl) {
	var wnd = window.open(addrurl.href,'','toolbar=0, scrollbars=1, resizable=1, status=0, width=550, height=400');
	wnd.opener = this;
	return false;
};

function ofertyframes(link) { if(parent == this) link.href = 'oferty.php'; };

function asstart(addrurl) {
	if(isMsie) {
		addrurl.style.behavior='url(#default#homepage)';
		addrurl.setHomePage(addrurl.href); 
	} else {
		alert("Aby strona RAFY.PL była startową\nwybierz w menu \"Edit > Preferences > Navigator\"\nopcję \"Use Current Page\"");
	};
	return false;
};

function switchmidi(pic, file) {
	if(pic.alt=='Włącz') {
		pic.alt='Wyłącz'; 
		pic.src='img/midi1.gif';
		bgsoundtag.src=file;
	} else {
		pic.alt='Włącz'; 
		pic.src='img/midi0.gif';
		bgsoundtag.src='';
	};
};