// -> getting variables from url

function getArgs() {
	var query = location.search.substring(1);
	var pairs = query.split("&");
	for(var i = 0; i < pairs.length; i++) {
		var pos = pairs[i].indexOf('=');
		if (pos == -1) continue;
		var argname = pairs[i].substring(0,pos);
		var value = pairs[i].substring(pos+1);
		args[argname] = unescape(value);
	}
	return args;
}

var args = new Object();
getArgs();

if (window.location.search != "") {	// only gets variables from url if there are any
	var id = (args['id']);
	var page = (args['page']);
	var media = (args['media']);
} else {	// sets initial variables
	var page = "1";
	var media = "1";
}

// -> end

// -> main navi start

MainNaviOver = new Array(); // status: over
MainNaviOff = new Array(); // status: off

for (i=1; i<=5; i++) {
	MainNaviOver[i] = new Image();
	MainNaviOff[i] = new Image();
	MainNaviOver[i].src = "images/navi_main_" + i + "_over.gif";
	MainNaviOff[i].src = "images/navi_main_" + i + "_off.gif";
}

function toggleMainNavi(itemindex) {		// rollover effect
	if (document.images["MainNaviImage" + itemindex].src.indexOf("_off.gif") >= 0) {
		document.images["MainNaviImage" + itemindex].src = MainNaviOver[itemindex].src;
	} else if (document.images["MainNaviImage" + itemindex].src.indexOf("_over.gif") >= 0) {
		document.images["MainNaviImage" + itemindex].src = MainNaviOff[itemindex].src;
	}
}

// -> end

// -> sub navi start

SubNaviOn = new Array(); // status: on
SubNaviOver = new Array(); // status: over
SubNaviOff = new Array(); // status: off

for (i=1; i<=5; i++) {
	SubNaviOn[i] = new Image();
	SubNaviOver[i] = new Image();
	SubNaviOff[i] = new Image();
	SubNaviOn[i].src = "images/navi_sub_" + i + "_on.gif";
	SubNaviOver[i].src = "images/navi_sub_" + i + "_over.gif";
	SubNaviOff[i].src = "images/navi_sub_" + i + "_off.gif";
}

function buildSubNavi() { // building menu
	if (page != 0) {
		document.images["SubNaviImage" + page].src = SubNaviOn[page].src; // switches between items according to page number
	}
}

function toggleSubNavi(itemindex) {		// rollover effect
	if (document.images["SubNaviImage" + itemindex].src.indexOf("_off.gif") >= 0) {
		document.images["SubNaviImage" + itemindex].src = SubNaviOver[itemindex].src;
	} else if (document.images["SubNaviImage" + itemindex].src.indexOf("_over.gif") >= 0) {
		document.images["SubNaviImage" + itemindex].src = SubNaviOff[itemindex].src;
	}
}

// -> end

// -> subsub navi start

SubSubNaviOn = new Array(); // status: on
SubSubNaviOver = new Array(); // status: over
SubSubNaviOff = new Array(); // status: off

for (i=1; i<=3; i++) {
	SubSubNaviOn[i] = new Image();
	SubSubNaviOver[i] = new Image();
	SubSubNaviOff[i] = new Image();
	SubSubNaviOn[i].src = "images/navi_subsub_" + i + "_on.gif";
	SubSubNaviOver[i].src = "images/navi_subsub_" + i + "_over.gif";
	SubSubNaviOff[i].src = "images/navi_subsub_" + i + "_off.gif";
}

function buildSubSubNavi() { // building menu
	if (page == 1) {
		document.images["SubSubNaviImage" + media].src = SubSubNaviOn[media].src; // switches between items according to page number
	}
}

function toggleSubSubNavi(itemindex) {		// rollover effect
	if (document.images["SubSubNaviImage" + itemindex].src.indexOf("_off.gif") >= 0) {
		document.images["SubSubNaviImage" + itemindex].src = SubSubNaviOver[itemindex].src;
	} else if (document.images["SubSubNaviImage" + itemindex].src.indexOf("_over.gif") >= 0) {
		document.images["SubSubNaviImage" + itemindex].src = SubSubNaviOff[itemindex].src;
	}
}

// -> end

// -> article popup

function article(index) {
	var URL = 'article.php?id=' + id + '&article=' + index;
	var l = "20";
	var t =	"20";
	var w = "516";
	var h = "400";
	var windowprops = "location=no, scrollbars=yes, menubars=no, toolbars=no, resizable=no" + ",left=" + l + ",top=" + t + ",width=" + w + ",height=" + h;
	popup = window.open(URL, "PopUp", windowprops);
	popup.focus();
}

// -> end

// -> projector popup

function projector(index, copyright) {
	var URL = 'projector.php?id=' + id + '&photo=' + index + '&copyright=' + copyright;
	var l = "20";
	var t =	"20";
	var w = "400";
	var h = "480";
	var windowprops = "location=no, scrollbars=yes, menubars=no, toolbars=no, resizable=no" + ",left=" + l + ",top=" + t + ",width=" + w + ",height=" + h;
	popup = window.open(URL, "Projector", windowprops);
	popup.focus();
}

// -> end

// -> musicbox popup

function musicbox(album, title) {
	var URL = 'data/music/' + id + '_' + album + '_' + title +'.mp3';
	var l = "20";
	var t =	"20";
	var w = "300";
	var h = "100";
	var windowprops = "location=no, scrollbars=yes, menubars=no, toolbars=no, resizable=no" + ",left=" + l + ",top=" + t + ",width=" + w + ",height=" + h;
	popup = window.open(URL, "Musicbox", windowprops);
	popup.focus();
}

// -> end

// -> imprint popup

function imprint() {
	var URL = 'imprint.php';
	var l = "20";
	var t =	"20";
	var w = "300";
	var h = "280";
	var windowprops = "location=no, scrollbars=yes, menubars=no, toolbars=no, resizable=no" + ",left=" + l + ",top=" + t + ",width=" + w + ",height=" + h;
	popup = window.open(URL, "Imprint", windowprops);
	popup.focus();
}

// -> end