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

function ChangeVisibility(layID,color) {
	if(layID){
		var myLayer = document.getElementById(layID);	
		myLayer.style.display="";
	}
	if(color){
		var layerHGAuswahl = document.getElementById("startseite_auswahlrubriken");	
		layerHGAuswahl.style.background=color;
		var layerHGBalken = document.getElementById("startseite_balken");	
		layerHGBalken.style.background=color;
	}
}

function hidelayer(layID) {
	var myLayer = document.getElementById(layID);	
	myLayer.style.display="none";
}

var popupmenuoldonload = window.onload;
window.onload = function() {
	var nav = document.getElementById('nav');
	if(nav){
	var uls = nav.getElementsByTagName('UL');
	for(var i = 0; i < uls.length; i++)
		new xMenu1(uls[i], 0, 'mouseover');		
	}
	var nav = document.getElementById('nav_bottom');
	if(nav){
	var uls = nav.getElementsByTagName('UL');
	for(var i = 0; i < uls.length; i++)
		new xMenu1(uls[i], 0, 'mouseover');	
	}
	/*	
	var nav = document.getElementById('nav1');
	var uls = nav.getElementsByTagName('UL');
	for(var i = 0; i < uls.length; i++)
		new xMenu1(uls[i], 0, 'mouseover');
	var nav = document.getElementById('nav2');
	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, img;
	if (menu) {
		xAddEventListener(menu.parentNode, openEvent, onOpen, false);
		img = menu.parentNode.firstChild.firstChild;
		if (img.onmouseover) {
			oldover = img.onmouseover;
			img.onmouseover = '';
		}
	}

	function onOpen() {
		if (!isOpen) {
			menu.style.display = 'block';
			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) {
			menu.style.display = '';
			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";
		}
	}
}

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

function open_function(url,width,height,options) {
	self.msgWindow = open(url, "Window", "width=" + width + ",height=" + height
		+ ",screenX=" + (screen.width-width)/2
		+ ",screenY=" + (screen.height-height)/2
		+ ",dependent=yes"
		+ ",left=" + (screen.width-width)/2
		+ ",top=" + (screen.height-height)/2
		+ options
	);
	if (self.msgWindow) {
		self.msgWindow.focus();
		if (self.msgWindow.opener == null) self.msgWindow.opener = self;
	}
}


// 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 = label.replace(/^\s*/, '');
			label = label.replace(/\s*$/, '');
			// if there is a '*' in the label - this indicates the inputfield to have 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);
}