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

var popupmenuoldonload = window.onload;
window.onload = function() {
    var nav = document.getElementById('nav');
    var uls = nav.getElementsByTagName('UL');
    for(var i = 0; i < uls.length; i++)
        new xMenu1(uls[i], 0, 'mouseover');
    if(popupmenuoldonload)
        popupmenuoldonload(); 
}

function xMenu1(menu, mouseMargin, openEvent) {
    var isOpen = false;
        var oldover, oldout, aObj, aClassName, img;
    if (menu) {
        xAddEventListener(menu.parentNode, openEvent, onOpen, false);
        aObj = menu.parentNode.firstChild;
                aClassName = aObj.className;
                img = aObj.firstChild;
        if(img)
            if (img.onmouseover) {
                oldover = img.onmouseover;
                img.onmouseover = '';
            }
    }
    function onOpen() {
        if (!isOpen) {
            aObj.className = 'hover';
                        xShow(menu);
            HideSelects(xPageX(menu), xPageY(menu), xWidth(menu), xHeight(menu));
            xAddEventListener(document, 'mousemove', onMousemove, false);
            isOpen = true;
            if (oldover) {
                oldover.apply(img, arguments);
                if (!oldout)
                    oldout = img.onmouseout;
                img.onmouseout = function () { };
            }
        }
    }
    function onMousemove(ev) {
        var e = new xEvent(ev);
        contains = (xHasPoint(menu, e.pageX, e.pageY, -mouseMargin) || xHasPoint(menu.parentNode, e.pageX, e.pageY, -mouseMargin));
        if(!contains) {
            var submenus = menu.getElementsByTagName('UL');
            for(var i = 0; i < submenus.length; i++)
                if(xHasPoint(submenus[i], e.pageX, e.pageY, -mouseMargin)) {
                    contains = true;
                    break;
                }
        }
        if(!contains) {
                        aObj.className = aClassName;
            xHide(menu);
            HideSelects(0, 0, 0, 0);
            xRemoveEventListener(document, 'mousemove', onMousemove, false);
            isOpen = false;
            if (oldout)
                oldout.apply(img, arguments);
        }
    }
}

var sel;
function HideSelects(x,y,w,h) {
    if(xIE4Up && !xMac) {
        var selx, sely, selw, selh, i
        if(!sel)
            sel = document.getElementsByTagName("SELECT");
        for(i = 0; i < sel.length; i++) {
            selx = xPageX(sel[i]);
            sely = xPageY(sel[i]);
            selw = sel[i].offsetWidth;
            selh = sel[i].offsetHeight;
            sel[i].style.visibility = (selx + selw > x && selx < x + w && sely + selh > y && sely < y + h) ? "hidden" : "visible";
        }
    }
}

window.addEvent('domready', function(){
    var target = $('nav_yellow_bar');
    target.setStyles({
        'top': 0,
        'left': 500
    });

    var fx = new Fx.Styles(target, {duration: 1000, wait: false});
    fx.options.transition = Fx.Transitions['Quad']['easeInOut'];

    var foundActive = false;
    var lis = document.getElementById('nav').getElementsByTagName('li');
    for(i=0;i<lis.length;i++)
    {
        if(lis[i].parentNode.id == 'nav')
        {
            $(lis[i].id).addEvent('mouseenter', function(event) {
                event = new Event(event);
                fx.start({
                    'top': 0,
                    'left': this.getLeft()
                });
                event.stop();
            });
        }

        if(lis[i].className.indexOf('active') > -1 || lis[i].className.indexOf('activenode') > -1)
        {
            var targetLi = $(lis[i].id);

            target.setStyles({
                'top': 0,
                'left': targetLi.getLeft()
            });

            foundActive = true;
        }
    }

    if(foundActive == false)
    {
        var lis = document.getElementById('nav').getElementsByTagName('li');
        for(i=0;i<lis.length;i++)
        {
            if(lis[i].parentNode.id == 'nav' && foundActive == false && i > 0)
            {
                foundActive = true;

                target.setStyles({
                    'top': 0,
                    'left': lis[i].getLeft()
                });
            }
        }
    }

    var startbildsrc = document.getElementById('startbildsrc');
    if(startbildsrc) {
        var now = new Date();
        var monthNow = now.getMonth();

        if(monthNow >= 7 && monthNow < 10)
        {
            startbildsrc.src = common + '/images/startbild3.jpg';
        }
        else if(monthNow >= 4 && monthNow < 7)
        {
            startbildsrc.src = common + '/images/startbild2.jpg';
        }
        else if(monthNow >= 1 && monthNow < 4)
        {
            startbildsrc.src = common + '/images/startbild1.jpg';
        }
        else
        {
            startbildsrc.src = common + '/images/startbild0.jpg';
        }
    }
});

/* Ändert die font-size des body Tags. D.h. alle Angaben die skaliert werden sollen müssen relativ (in %) angegeben werden */
var busywaiter = window.setInterval(function() {
    if (document.body) {
        window.clearInterval(busywaiter);
        var nameEQ = "fontsize=";
        var ca = document.cookie.split(';');
        for(var i=0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') c = c.substring(1, c.length);
            if (c.indexOf(nameEQ) == 0) return document.body.style.fontSize = c.substring(nameEQ.length, c.length);
        }
    }
}, 10);


function changeFontSize(factor) {
    if (document.body.currentStyle)
        var fontsize = document.body.currentStyle['fontSize'];
    else if (window.getComputedStyle)
        var fontsize = document.defaultView.getComputedStyle(document.body, null).getPropertyValue('font-size');

    fontsize = /(\d+)(.+)/.exec(fontsize);
    document.body.style.fontSize = (parseInt(fontsize[1]) + factor) + fontsize[2];

    document.cookie = "fontsize=" + document.body.style.fontSize + "; path=/";
    
    setTimeout('document.getElementById(\'content\').innerHTML = document.getElementById(\'content\').innerHTML', 10);
}

function resetFontSize() {
    document.body.style.fontSize = '';
    document.cookie = "fontsize=;path=/";
    setTimeout('document.getElementById(\'content\').innerHTML = document.getElementById(\'content\').innerHTML', 10);
}

// 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";
    x = Math.random();
    fenster = window.open(url, 'win', attrib);
    return false;
}