var tab1href = "";
var tab2href = "";
var tab3href = "";
var tab4href = "";
var tab5href = "";

function setTabsRef(relativePath) {
	if((typeof(relativePath) != "undefined") && (relativePath != "")) {
		tab1href = "javascript:loadLastFrameset('1', getContentURL('monument.html', '" + relativePath + "'))";
		tab2href = "javascript:loadLastFrameset('2', getContentURL('city.html', '" + relativePath + "'))";
		tab3href = "javascript:loadLastFrameset('3', getContentURL('bsc.html', '" + relativePath + "'))";
		tab4href = "javascript:loadLastFrameset('4', getContentURL('search.html', '" + relativePath + "'))";
		tab5href = "javascript:loadLastFrameset('5', getContentURL('thinkstereo.html', '" + relativePath + "'))";
	} else {
		tab1href = "javascript:loadLastFrameset('1', 'monument.html')";
		tab2href = "javascript:loadLastFrameset('2', 'city.html')";
		tab3href = "javascript:loadLastFrameset('3', 'bsc.html')";
		tab4href = "javascript:loadLastFrameset('4', 'search.html')";
		tab5href = "javascript:loadLastFrameset('5', 'thinkstereo.html')";
	}
}

function navigatorTest() {
	document.write("Caricamento di un secondo file.js esterno.");
	
	document.write("<P>The value of navigator.appCodeName is: " + navigator.appCodeName);
	document.write("<P>The value of navigator.appName is: " + navigator.appName);
	document.write("<P>The value of navigator.appVersion is: " + navigator.appVersion);
	document.write("<P>The value of navigator.userAgent is: " + navigator.userAgent);
}

function println(s) {
	document.write(s, "<BR>");
}

// Sets cookie values. Expiration date is optional
// Tokens number and index are optional; they require if cookie value is a collection of tokens
// Any token starts with "@#@#", where "#" sign is an integer 0 to tokens number - 1
function setCookie(name, value, expire, tokensNb, index) {
	var newValue = value;
	
	// cookie is a collection of tokens
	if((typeof(tokensNb) != "undefined") && (typeof(index) != "undefined")) {
		if((tokensNb > 0) && (index >= 0)) {
			if(index < tokensNb) {
				newValue = getTokens(name, value, tokensNb, index);
//				alert("" + newValue);
			} else {
				newValue = "";
			}
		}
	}
	
	document.cookie = name + "=" + escape(newValue) + ((expire == null) ? "" : ("; expires=" + expire.toGMTString())) + "; path=/";
//	document.writeln(document.cookie);
}

function getTokens(name, value, tokensNb, index) {
	tokens = getCookie(name);
	
	if((typeof(tokens) != "undefined") && (tokens.length > 0)) {
		// do nothing
	} else {
		tokens = "";
		for(var i = 0; i < tokensNb; i++) {
			str = "@" + i + "@" + i;
			tokens += str;
		}
	}
	
	str1 = "@" + index + "@" + index;
	start = tokens.indexOf(str1) + 4;
	if(index < tokensNb - 1) {
		str2 = "@" + (index + 1) + "@" + (index + 1);
		end = tokens.indexOf(str2);
	} else {
		end = tokens.length;
	}
	
	newTokens = tokens.substring(0, start) + value + tokens.substring(end, tokens.length);
	return newTokens;
}

function getCookie(Name) {
	var search = Name + "=";
	if(document.cookie.length > 0) { // if there are any cookies
		offset = document.cookie.indexOf(search);
		if(offset != -1) { // if cookie exists
			offset += search.length;
			// set index of beginning of value
			end = document.cookie.indexOf(";", offset);
			// set index of end of cookie value
			if(end == -1) {
				end = document.cookie.length;
			}
			return unescape(document.cookie.substring(offset, end));
		}
	}
}

function controlIfCookieTokenIsRight(name, tokensNb, index) {
	tokens = getCookie(name);
	var navbarURL = document.location.toString();
	var partialPath = navbarURL;
	offset = navbarURL.lastIndexOf("/");
	if(offset != -1) { // if "/" exists
		partialPath = navbarURL.substring(0, offset);
	}
//	alert("partialPath: " + partialPath);
	
	var searchedToken = getCookieToken(name, index);
//	alert("searchedToken: " + searchedToken);
	offset = searchedToken.indexOf(partialPath);
	if(offset == -1) { // cookie token is wrong
//		alert("cookie token is wrong");
		setCookie(name, "", null, tokensNb, index);
//		for(var i = 1; i < tokensNb; i++) {
//			setCookie(name, "", null, tokensNb, i);
//		}
	}
}

function getCookieToken(name, index) {
	tokens = getCookie(name);
	searchedToken = "";
	
	if((typeof(tokens) != "undefined") && (tokens.length > 0)) {
		str1 = "@" + index + "@" + index;
		start = tokens.indexOf(str1) + 4;
		index2 = parseInt(index, 10) + 1;
		str2 = "@" + index2 + "@" + index2;
		end = tokens.indexOf(str2, start);
		if(end == -1) {
			end = tokens.length;
		}
//		alert("Start: " + start + ". End: " + end);
		
		if(start != -1) {
			searchedToken = tokens.substring(start, end);
		}
//		document.writeln("Start: " + searchedToken);
	}
	
//	alert("Last content: " + searchedToken);
//	document.writeln("Last content: " + searchedToken);
	return searchedToken;
}


function getContentURL(fileName, relativePath) {
	var contentURL = "";
	
	if((typeof(relativePath) != "undefined") && (relativePath.length > 0)) {
		counter = 0;
		start = 0;
		tof = true;
		while(tof) {
			offset = relativePath.indexOf("../", start);
			if(offset == -1) {
				tof = false;
			} else {
				start += 3;
				counter++;
			}
		}
		relativePath = relativePath.substring(start, relativePath.length);
		
		var oldURL = document.location.toString();
		offset = oldURL.lastIndexOf("/");
		if(offset != -1) { // if "/" exists
			contentURL = oldURL.substring(0, offset);
			for(var i = 0; i < counter; i++) {
				offset = contentURL.lastIndexOf("/");
				if(offset != -1) {
					contentURL = contentURL.substring(0, offset);
				}
			}
			contentURL = contentURL + "/" + relativePath;
		}
	}
	
	contentURL += fileName;
//	alert(contentURL);
	return contentURL;
}

function loadLastFrameset(type, defaultPage, replaceURL) {
	var framesetURL = "";
	if(type == "1") {
		framesetURL = getCookie("abcMonCookie");
	} else if(type == "2") {
		framesetURL = getCookie("abcCityCookie");
	} else if(type == "3") {
		framesetURL = getCookie("abcBSCCookie");
	} else if(type == "4") {
		framesetURL = getCookie("abcSearchCookie");
	} else if(type == "5") {
		framesetURL = getCookie("abcTSCookie");
	}
	
	if((typeof(framesetURL) != "undefined") && (framesetURL.length > 0)) {
		top.location = framesetURL;
	} else {
		if(typeof(defaultPage) != "undefined") {
			top.location = defaultPage;
		}
	}
	
	if(replaceURL) {
		document.location.replace(top.location);	// consente il funzionamento del pulsante "back" del browser
	}
	
//	alert("Last Frameset:  " + top.location);
}

function loadLastContent(type, subtype, defaultPage) {
	var oldURL = document.location.toString();
//	alert(oldURL);
	offset = oldURL.lastIndexOf("/");
	if(offset != -1) { // if "/" exists
		oldURL = oldURL.substring(0, offset + 1) + defaultPage;
	}
	
//	alert("Last Content:  " + oldURL);
	var contentURL = "";
	if(type == "1") {
		controlIfCookieTokenIsRight("abcMonContentCookie", 7, parseInt(subtype));
		contentURL = getCookieToken("abcMonContentCookie", subtype);
	} else if(type == "2") {
		controlIfCookieTokenIsRight("abcCityContentCookie", 9, parseInt(subtype));
		contentURL = getCookieToken("abcCityContentCookie", subtype);
	} else if(type == "3") {
		contentURL = getCookieToken("abcBSCContentCookie", subtype);
	} else if(type == "4") {
		contentURL = getCookieToken("abcSearchContentCookie", subtype);
	} else if(type == "5") {
		contentURL = getCookieToken("abcTSContentCookie", subtype);
	}
	
	if((typeof(contentURL) == "undefined") || (contentURL.length == 0)) {
		contentURL = oldURL;
	}
	
//	alert("Last Content:  " + contentURL);
//	document.location = contentURL;
	document.location.replace(contentURL);	// consente il funzionamento del pulsante "back" del browser
//	document.writeln("Last content: " + contentURL);
}

function loadInFrame(path) {
	if(parent.frames.length == 0) {
//		alert("no frame");
		var filename = "" + path;
		var contentURL = "";
		if((typeof(path) != "undefined") && (path.length > 0)) {
			contentURL += filename;
		} else {
			contentURL += "index.html";
		}
		parent.document.location = contentURL;
		
//		var standardContentURL = getContentURL(contentURL);
//		document.location = standardContentURL;
//		document.location.replace(standardContentURL);	// consente il funzionamento del pulsante "back" del browser
		
//		alert("URL: " + standardContentURL);
//	} else {
//		alert("frame");
	}
}

var prev = "Torna indietro";
var next = "Vai avanti";

function goNext() {
	if(top.frames.length == 0) {
//		alert("no frames");
		history.forward();
	} else {
//		alert("frames");
		top.frames['content'].history.forward();
	}
}

function goPrev() {
	if(top.frames.length == 0) {
//		alert("no frames");
		history.back();
	} else {
//		alert("frames");
		top.frames['content'].history.back();
	}
}

function showStatus(s) {
	parent.status = s;
}