var myObjects = new Object();

function domready() {
    windowdomready = true;
}  

function getImage(obj)
{
	return obj.getElementsByTagName('img')[0];
}

function initAccordion() {
	var accordion = new Accordion('.toggler', '.element', {opacity: false,
		onActive: function(toggler, element){toggler.setStyle('background','#83B817 url(../common/images/pfeil_top.gif) right no-repeat'),toggler.setStyle('color','#fff');},
		onBackground: function(toggler, element){toggler.setStyle('background','#E6F1D1 url(../common/images/pfeil_bottom.gif) right no-repeat')
		,toggler.setStyle('color','#006633');}
	}, $('accordion_overview'));
}

window.addEvent('domready', function() {
	setTimeout('initAccordion()', 100);

	initNav();   
});

window.addEvent('load', function(){
    initSujets();
});

function getAdr(prefix, postfix, text) {
        document.write('<a href="mailto:' + prefix + '@' + postfix + '">' + (text ? text.replace(/&quot;/g, '"').replace(/%EMAIL%/, prefix + '@' + postfix) : prefix + '@' + postfix) + '</a>');
}

function swapImage(element, newimage) {
	var oldsrc = element.src;

	if(element.src.indexOf('2.gif') > -1 && element.parentNode.parentNode.parentNode.id.indexOf('nav') > -1) {
		element.src = element.src.split('2.gif').join('.png');
	}
	else {
		element.src = newimage;
	}

	if (!element.onmouseout)
		element.onmouseout = function (event) { swapImage(this, oldsrc); };
} 

function initNav() {
    if($('nav2'))
    {
        navObjects = new Object();
        navObjects.nav = $('nav');
        navObjects.nav.items = $$('#nav li ul');
        navObjects.nav.items.each(function(item){
            new initNavItemMenu(item);
        });

        navObjects.nav2 = $('nav2');

        navObjects.nav2.items = $$('#nav2 li ul');
        navObjects.nav2.items.each(function(item){
            if(item.parentNode.parentNode.id == 'nav2')
                        new initNavItemMenu(item);
        });
    }
    else
    {
        setTimeout('initNav()', 100);
    }
}

  
function initSujets()
	{
		if($('sujets')){
        myObjects.imagebilder = $('sujets').getElements('img');
        myObjects.current_titleimage_index = 0;
        window.setTimeout(rotateTitleimages,4000);}
	}

function rotateTitleimages(){

    if (myObjects.imagebilder.length>1){
        var next_titleimage_index = myObjects.current_titleimage_index + 1;
        if (next_titleimage_index > myObjects.imagebilder.length-1){
            next_titleimage_index = 0;
        }
        $(myObjects.imagebilder[myObjects.current_titleimage_index]).effects({duration:1000}).start({'opacity':[0]});
        myObjects.current_titleimage_index = next_titleimage_index;
        $(myObjects.imagebilder[myObjects.current_titleimage_index]).effects({duration:1000}).start({'opacity':[1]});
        window.setTimeout(rotateTitleimages,6000);
    }
}


function initNavItemMenu(navItemMenu) {
    var navItemMenuChildren, navItem, navItemSlideFx, navItemSlideObj, navItemCoords , navItemA, e, fxDuration;
    if (navItemMenu){
        navItemMenuChildren = navItemMenu.getChildren();
        fxDuration = navItemMenuChildren.length * 90;
        navItemSlideFx = new Fx.Slide(navItemMenu, {duration:fxDuration});
        navItemSlideFx.hide();
        navItemSlideObj = navItemMenu.getParent();
        navItem = navItemSlideObj.getParent();
        navItemA = $(navItem.getChildren()[0]);
        navItem.addEvent('mouseenter', function(event){
            e = new Event(event);
            navItemA.addClass('hover');
            navItemSlideFx.stop();
            navItemCoords = navItemMenu.getCoordinates();
            navItemSlideObj.style.width = navItemCoords.width + 'px';
            navItemSlideFx.slideIn();
            e.stop();

		if(getImage(this))
		{
			if(getImage(this).src.indexOf('2.gif') == -1 && getImage(this).onmouseover != undefined)
				getImage(this).src = getImage(this).src.split('.png').join('2.gif');

			getImage(this).onmouseout = function() {};
		}
        });
        navItem.addEvent('mouseleave', function(event){
            e = new Event(event);
            navItemA.removeClass('hover');
            navItemSlideFx.stop();
            navItemSlideFx.slideOut();
            e.stop();

		if(getImage(this))
		{
			if(getImage(this).src.indexOf('2.gif') > -1 && getImage(this).onmouseover != undefined)
			{
				getImage(this).src = getImage(this).src.split('2.gif').join('.png');
			}
		}
        });
    }
}



// deletes leading and trailing spaces in a string - adds the function directly to the String Object, so that all strings inherit this method
String.prototype.trim = function() {
    return this.replace(/(^\s*)|(\s*$)/g, '');
}

//checkEmail - needed for forms
function checkEmail(val) {
	if (val) {
		var usr = "([a-zA-Z0-9][a-zA-Z0-9_.-]*|\"([^\\\\\x80-\xff\015\012\"]|\\\\[^\x80-\xff])+\")";
		var domain = "([a-zA-Z0-9][a-zA-Z0-9._-]*\\.)*[a-zA-Z0-9][a-zA-Z0-9._-]*\\.[a-zA-Z]{2,5}";
		var regex = "^"+usr+"\@"+domain+"$";
		var myrxp = new RegExp(regex);
		var check = (myrxp.test(val));
		if (check!=true) {
			return false;
		}
		else {
			return true;
		}
	}
}

/*
validates formfields if they have a value or not
to check for other options do the following
specialfields = new Object();
specialfields.fieldname = new Object();
specialfields.fieldname.check1 = 'function_to_call,error_message';
specialfields.fieldname.check2 = 'second_function_to_call,second_error_message';
specialfields.another_fieldname = new Object();
specialfields.another_fieldname.check1 = 'function_to_call,error_message';
*/
function validateForm(form,specialfields) {
	var errors = new Array();
	var fields = form.getElementsByTagName('label');
	for (i = 0; i < fields.length; i++) {
		var span = fields[i].getElementsByTagName('span')[0];
		if (span && span.firstChild) {
			var label = span.firstChild.data;
			label = label.trim();
			// if there is a '*' in the label - this indicates the inputfield has to be filled
			if (label.charAt(label.length - 1) == '*') {
				label = label.substring(0, label.length - 1).trim();
				// get the inputfield
				var obj_input = fields[i].getElementsByTagName('input');
				if (!obj_input[0])
					obj_input = fields[i].getElementsByTagName('select');
				if (!obj_input[0])
					obj_input = fields[i].getElementsByTagName('textarea');

				// if there is an inputfield
				if (obj_input && obj_input[0]) {
					input = obj_input[0];
					error = false;
					
					// check if the inputfield has a value
					if (!input.value || input.value.trim().length==0) {
						error = true;
						errors.push(label + ' nicht eingegeben');
					}
					
					// check the inputfield for special things (email, ...)
					if (!error && specialfields[input.name]){
						specialfield = specialfields[input.name];
						for (check in specialfield){
							check_function = specialfield[check].split(',')[0];
							check_message = specialfield[check].split(',')[1];
							if (!eval(check_function)(input.value)){
								error = true;
								errors.push(label + ' ' + check_message);
							}
						}
					}

					// on error give the label the className 'error' otherwise delete the className 'error' (if exists)
					if (error) {
						className = fields[i].className;
						if (className.length>0){
							className = className + ' ';
						}
						fields[i].className = className + 'error';
					} else {
			            	className = fields[i].className;
						if (className.indexOf('error')>-1){
								className = className.replace(' error', '');
								className = className.replace('error', '');
								fields[i].className = className;
						}
					}
				}
			}
		}
	}

	return errors;
}

function showFormErrors (errors) {
	error_message = '';
	for (i=0;i<errors.length;i++){
		error_message += errors[i] + '\n';
	}
	alert(error_message);
}


function popup(url, typ, para1, width, height) {
	attrib = "";
	Y = (screen.height - width) / 2;
	X = (screen.width - height) / 2;
	X = Math.round(X);
	Y = Math.round(Y);
	if (para1 == 'CENTER') attrib += 'height=' + height + ',width=' + width + ',top=' + Y + ',left=' + X;
	if (typ == 'TYP1') attrib += ",scrollbars=no";
	if (typ == 'TYP2') attrib += ",scrollbars=yes";
	if (typ == 'TYP3') attrib += ",scrollbars=yes,menubar=yes";
	fenster = window.open(url, 'win', attrib);
	return false;
}
 
function judf_link_gifchange(obj,over){
	
	if (obj){
		obj_img = obj.getElementsByTagName('IMG')[0];
		file = obj_img.src;
		tmp_img= new Image();
		if (over){
			tmp_img.src = file.replace(/2*\.gif/,'2.gif');
		}else{
			tmp_img.src = file.replace(/2*\.gif/,'.gif');
		}
		obj_img.src = tmp_img.src;
	}
}
function judf_link_pngchange(obj,over){
	
	if (obj){
		obj_img = obj.getElementsByTagName('IMG')[0];
		file = obj_img.src;
		tmp_img= new Image();
		if (over){
			tmp_img.src = file.replace(/2*\.png/,'2.png');
		}else{
			tmp_img.src = file.replace(/2*\.png/,'.png');
		}
		obj_img.src = tmp_img.src;
	}
}


/* Startpics */

var currentImage = 0;
var totalImages = 0;
var timeout = 4000;
var blenddur = 2000;
var gImages;
var current;
var next;

window.addEvent('domready', function() {
	if($('startpic'))
		initGallery();
	else
		setTimeout('initGallery()', 100);
});

function initGallery() {
	if($('startpic1')) {
		gImages = $$('#startpic1 img');
		totalImages = gImages.length;

		gImages.each(function(item, i){
			if(i != 0) {
				item.effects({}).set({'opacity':[0]});
			} else {
				item.effects({}).set({'opacity':[1]});
			}
		});

		setTimeout('showNext()', timeout);
	}
}

function showNext() {
	nextnumber = currentImage + 1;

	if(nextnumber >= gImages.length) {
		nextnumber = 0;
	}

	gImages.each(function(item, i){
		if(i == currentImage)
			current = item;
		else
			if(i == nextnumber)
				next = item;
	});

	current = gImages[currentImage];
	next = gImages[nextnumber];

        $(current).effects({duration:1000}).start({'opacity':[1,0]});
        $(next).effects({duration:1000}).start({'opacity':[0,1]});
	currentImage = nextnumber;

	setTimeout('showNext()', timeout);
}