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

// 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('span');
	for (i = 0; i < fields.length; i++) {
		var span = fields[i].getElementsByTagName('label')[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;
}

myObjects = new Object();

function showFormErrors (errors, form) {
	error_message = '';
        if (form){
            $(form);
            error_message = '<strong>ACHTUNG: Sie haben vergessen folgende Daten anzugeben:</strong><ul>';
            for (i=0;i<errors.length;i++){
                    error_message += '<li>' + errors[i] + '</li>';
            }
            error_message += '</ul>';
            if (!myObjects.errorDiv){
                myObjects.errorDiv = new Element('div', {'id':'formErrors'});
                myObjects.errorDiv.injectTop(form);
            }
            myObjects.errorDiv.innerHTML = error_message;
            location.href='#formErrors';
        }else{
            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 fx;
window.addEvent('domready', function(){
	var centerbox_fade = document.getElementById('centerbox_fade');
	if(centerbox_fade)
	{
		$(centerbox_fade).effects({}).set({'opacity':[0]});
		fx = new Fx.Style(centerbox_fade, 'opacity', {duration: 1000, wait: false});
	}

	var contentimage1 = document.getElementById('contentimage1');
	var contentimage2 = document.getElementById('contentimage2');
	var contentimage3 = document.getElementById('contentimage3');
	if(contentimage1)
	{
		co2 = new Fx.Style(contentimage2, 'opacity', {duration: 1000, wait: false}).set(0);
		co3 = new Fx.Style(contentimage3, 'opacity', {duration: 1000, wait: false}).set(0);

		setTimeout('fadeContentImage()', 4000);
	}
});

var currentContentImage = 1;
function fadeContentImage()
{
	var currentImage = document.getElementById('contentimage'+currentContentImage);

	currentContentImage++;
	if(currentContentImage > 3)
		currentContentImage = 1;

	var nextImage = document.getElementById('contentimage'+currentContentImage);

	co2 = new Fx.Style(currentImage, 'opacity', {duration: 1000, wait: false}).start(1,0);
	co3 = new Fx.Style(nextImage, 'opacity', {duration: 1000, wait: false}).start(0,1);

	setTimeout('fadeContentImage()', 4000);
}

/* Praxis-Script */

function ShowGallery(id) {
	for(i=0;i<gallerypix.length;i++) {
		document.getElementById('galpic_'+gallerypix[i]).style.display = 'none';
		document.getElementById('galnav_'+gallerypix[i]).style.display = 'none';
	}

	document.getElementById('galpic_'+gallerypix[id]).style.display = 'block';
	document.getElementById('galnav_'+gallerypix[id]).style.display = 'block';
}