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); };
}





// 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;
}

var currentImage = 0;
var totalImages = 6;
var cancelshownext = 0;

function showGallery(img)
{
	currentImage = img;

	for(i=1; i<=6; i++)
	{
		obj = document.getElementById('navbild'+i);
		if(obj)
		{
			if(img != i)
			{
				$(obj).effects({}).set({'opacity':[0]});
			}
			else
			{
				$(obj).effects({}).set({'opacity':[1]});
			}
		}

		obj = document.getElementById('navbild'+i+'_b');
		if(obj)
		{
			$(obj).effects({}).set({'opacity':[0]});
		}

	}

	showActiveLink();
	setTimeout('showNext(1)', 4000);
}

function showNext(override, newnextnumber)
{
	if((newnextnumber != undefined && newnextnumber != currentImage) || newnextnumber == undefined)
	{
		nextnumber = currentImage + 1;

		if(nextnumber > totalImages)
		{
			nextnumber = 1;
		}

		if(newnextnumber != undefined)
			nextnumber = newnextnumber;

		current = document.getElementById('navbild'+currentImage);
		next = document.getElementById('navbild'+nextnumber);

		fx = new Fx.Style(current, 'opacity', {duration: 1500, wait: false}).start(1,0);
		fx2 = new Fx.Style(next, 'opacity', {duration: 1500, wait: false}).start(0,1);

		currentImage = nextnumber;

		if(newnextnumber == undefined)
			setTimeout('showNext(0)', 4000);

		showActiveLink();
	}
}


window.addEvent('domready', function() {
        var startpage = document.getElementById('startpage');
	if(startpage)
	{
	document.getElementById('startnav_image').style.visibility='hidden';
        }
});

window.addEvent('load', function() {
	var startpage = document.getElementById('startpage');
	if(startpage)
	{
		document.getElementById('startnav_image').style.visibility='visible';
		showGallery(1);
	}
});

var overimage = 0; //if user moves over link image this is set to the current number

function showSpecial(number)
{
	next = document.getElementById('navbild'+number+'_b');
	fx = new Fx.Style(next, 'opacity', {duration: 500, wait: false}).start(0,1);
	document.getElementById('linkimage'+number).src = document.getElementById('imghover'+number).href;
	overimage = number;
	showActiveLink();
}

function hideSpecial(number)
{
	next = document.getElementById('navbild'+number+'_b');
	fx = new Fx.Style(next, 'opacity', {duration: 500, wait: false}).start(1,0);
	document.getElementById('linkimage'+number).src = document.getElementById('imgnormal'+number).href;
	overimage = 0;
	showActiveLink();
}

function showActiveLink()
{
	if(overimage == 0)
	{
		for(i=1;i<=6;i++)
		{
			if(i == currentImage)
			{
				document.getElementById('linkimage'+i).src = document.getElementById('imghover'+i).href;
			}
			else
			{
				document.getElementById('linkimage'+i).src = document.getElementById('imgnormal'+i).href;
			}
		}
	}
	else
	{
		for(i=1;i<=6;i++)
		{
			if(i != overimage)
			{
				document.getElementById('linkimage'+i).src = document.getElementById('imgnormal'+i).href;
			}
		}
	}
}