//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='74px 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)';
	}
}
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;
		}
	}
});