getPersonalisation();

var datenow = new Date();
var month = datenow.getMonth() + 1;
var year = datenow.getFullYear();
var startMonth = month + 1;
var activeSheet = month;
var sheetScroll = 0;


function switchSheet(opt) {
	if(opt == 'next') {
		if(sheetScroll >= 12) return;
		sheetScroll++;

		activeSheet = activeSheet + 1;
		if(activeSheet >= 13) activeSheet = 1;
		if(sheetScroll == 1) activeSheet = startMonth;

		getPersonalisation();
		$("#sheet").css('background-image', 'url(images/sheet/desk_' + getSheet() +'.gif)');
	}
	if(opt == 'last') {
		if(sheetScroll > 0) sheetScroll--;
		else return;

		if(activeSheet == 1 && sheetScroll != 0) {
			activeSheet = 12;
		} else
		if(sheetScroll == 0) {
			activeSheet = 0;
		} else {
			activeSheet = activeSheet - 1;
		}

		getPersonalisation();
		$("#sheet").css('background-image', 'url(images/sheet/desk_' + getSheet() +'.gif)');
	}
}

function getPersonalisation() {
	var img = new Image();
	$('#personalisationImage').load(function () {
	}).error(function () {
		// notify the user that the image could not be loaded
	}).attr('src', 'images/sheet/pLoad.jpg');

	var img = new Image();
	$('#personalisationImage').load(function () {
		$(this).fadeIn();
	}).error(function () {
		// notify the user that the image could not be loaded
	}).attr('src', 'index.php?action=GetPersonalisation&p=' + activeSheet + '&forename=' + SHEETFORENAME + '&surname=' + SHEETSURNAME + SID_ARG_2ND);
}

function getSheet() {
	var sheet = "";
	var sheetyear = "";

	// when month is december, then take next year
	if(month == 12) sheetyear = (year + 1);
	else
	if(activeSheet <= month) {
		sheetyear = (year + 1);
	} else {
		sheetyear = year;
	}

	if(activeSheet == 0) {
		if(month == 12) {
			sheet = (year + 1) + "cover";
		} else {
			sheet = year + "-" + (year + 1) + "cover";
		}
	} else
	if(activeSheet <= 9) sheet = sheetyear + '' + "0" + activeSheet;
	else sheet = sheetyear + '' + activeSheet;

	return sheet;
}

function submitSheet() {
	if($("#forename").val() != "" && $("#surname").val() != "") {
		$("#sheetForename").val($("#forename").val());
		$("#sheetSurname").val($("#surname").val());

		return true;
	}
	alert("Bitte Vor- und Nachnamen angeben!");

	return false;
}