//Diverse Elemente bei kleiner Fenstergröße verändern
function check_resolution() {
    //array aus IDs die ausgeblendet werden sollen
    var array = new Array();
    var obj;

    if (document.body.offsetWidth < 995) {
        for(i = 0; i < array.length; i++) {
            obj = document.getElementById(array[i])
            if(obj)
                obj.style.display = 'none'
        }
        if (document.getElementById('contactinfo')) document.getElementById('contactinfo').style.display='none';
        if (document.getElementById('weiter')) document.getElementById('weiter').style.background='none';
        if (document.getElementById('weiter')) document.getElementById('weiter').style.left='445px';
        if (document.getElementById('author')) document.getElementById('author').style.left='670px';
        if (document.getElementById('nav')) document.getElementById('nav').style.padding='15px 0px 0px 0px';
        if (document.getElementById('calc')) document.getElementById('calc').style.width='535px';
        if (document.getElementById('maincontent-sp')) document.getElementById('maincontent-sp').style.display='none';
        if (document.getElementById('laufband')) document.getElementById('laufband').style.display='none';
        if (document.getElementById('headerimg')) document.getElementById('headerimg').style.background='url('+common+'/images/header_800.jpg)';
    } else {
        for(i = 0; i < array.length; i++) {
            obj = document.getElementById(array[i])
            if(obj)
                obj.style.display = ''
        }
        if (document.getElementById('contactinfo')) document.getElementById('contactinfo').style.display='block';
        if (document.getElementById('weiter')) document.getElementById('weiter').style.background='';
        if (document.getElementById('weiter')) document.getElementById('weiter').style.left='664px';
        if (document.getElementById('author')) document.getElementById('author').style.left='890px';
        if (document.getElementById('nav')) document.getElementById('nav').style.padding='178px 0px 0px 0px';
        if (document.getElementById('calc')) document.getElementById('calc').style.width='650px';
        if (document.getElementById('maincontent-sp')) document.getElementById('maincontent-sp').style.display='block';
        if (document.getElementById('laufband')) document.getElementById('laufband').style.display='block';
        if (document.getElementById('headerimg')) document.getElementById('headerimg').style.background='url('+common+'/images/header_01.jpg)';
    }

    if (document.body.offsetHeight < 745) {
        if (document.getElementById('startpage')) document.getElementById('contactinfo').style.display='none';
    }
    else {
        if (document.getElementById('startpage')) document.getElementById('contactinfo').style.display='block';
    }
}
window.onresize = window.onload = check_resolution;

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); };
}

function validateForm(form) {
    var fields = form.getElementsByTagName('label')
    for (i = 0; i < fields.length; i++) {
        var span = fields[i].getElementsByTagName('span')[0]
        if (span) {
            var label = span.firstChild.data
            label = label.replace(/^\s*/, '')
            label = label.replace(/\s*$/, '')
            if (label.charAt(label.length - 1) == '*' && ! fields[i].getElementsByTagName('input')[0].value) {
                alert('Fehler: ' + label.substring(0, label.length -1) + ' nicht eingegeben')
                fields[i].getElementsByTagName('input')[0].focus()
                return false
            }
        }
    }
    return true
}

// Leerzeichen hinten und vorne bei einem String Objekt wegschneiden
function trim(string) {
    return string.replace(/^\s*|\s*$/,'');
}

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) {
            var label = span.firstChild.data;
            label = trim(label)
            // if there is a '*' in the label - this indicates the inputfield has to be filled
            if (label.charAt(label.length - 1) == '*'){
                // 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 || trim(input.value).length==0) {
                        error = true;
                        errors.push(label.substring(0, label.length -1) + ' 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.substring(0, label.length -1) + 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;
}

function getCurrentFontSize() {
    if (document.body.currentStyle)
    {
        var fontsize = document.body.currentStyle['fontSize'];
        var lineheight = document.body.currentStyle['lineHeight'];
    }
    else if (window.getComputedStyle)
    {
        var fontsize = document.defaultView.getComputedStyle(document.body, null).getPropertyValue('font-size');
        var lineheight = document.defaultView.getComputedStyle(document.body, null).getPropertyValue('line-height');
    }

    fontsize = /(\d+)(.+)/.exec(fontsize);
    fontsize = (parseInt(fontsize[1]));

    lineheight = /(\d+)(.+)/.exec(lineheight);
    lineheight = (parseInt(lineheight[1]));

    return(fontsize + '-' + lineheight);
}

/* 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) document.body.style.fontSize = c.substring(nameEQ.length, c.length);
        }

        nameEQ = "lineheight=";
        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) document.body.style.lineHeight = c.substring(nameEQ.length, c.length);
        }
        if (document.getElementById('maincontent'))
            setTimeout('document.getElementById(\'maincontent\').innerHTML = document.getElementById(\'maincontent\').innerHTML', 10);
    }
}, 10);

function resetFontSize() {
    document.getElementById('content').style.display='none';
    document.body.style.fontSize = '';
    document.body.style.lineHeight = '';
    document.getElementById('content').style.display='block';

    document.cookie = "fontsize=;lineheight=;path=/";
    if (document.getElementById('maincontent'))
        setTimeout('document.getElementById(\'maincontent\').innerHTML = document.getElementById(\'maincontent\').innerHTML', 10);
}

function changeFontSize(factor) {
    var currentFontSize = getCurrentFontSize();
    currentFontSize = currentFontSize.split('-');
    var fontsize = currentFontSize[0];
    var lineheight = currentFontSize[1];

    var newsize = parseInt(fontsize) + factor;

    document.getElementById('content').style.display='none';
    var fontSizeChange = new Fx.Style(document.body, 'font-size', {duration:500});
    fontSizeChange.set(newsize);
    var lineHeightChange = new Fx.Style(document.body, 'line-height', {duration:500});
    lineHeightChange.set((newsize+6));
    document.getElementById('content').style.display='block';

    document.cookie = "fontsize=" + newsize + "px; lineheight="+ (newsize+6)+ "px; path=/";
    if (document.getElementById('maincontent'))
        setTimeout('document.getElementById(\'maincontent\').innerHTML = document.getElementById(\'maincontent\').innerHTML', 10);
}

window.addEvent('domready', function() {
    var search_string = 'Seite durchsuchen …'
    var searchinput;
    searchinput = document.getElementById('searchinput');
    searchinput.onfocus = function(e) { 
        if (searchinput.value==search_string) {
            searchinput.value = '';
        }
    }
    searchinput.onblur = function(e) { 
        if (searchinput.value=='') {
            searchinput.value = search_string;
        }
    }
});