function truebody() {
	return document.getElementsByTagName('body')[0]
}

function showAlt(ele, customtext) {
	var img = document.createElement("div")
	img.style.display='none'
	img.id = 'hovertitle'
	img.innerHTML = ele.alt

	if(customtext != undefined)
		img.innerHTML = customtext

	truebody().appendChild(img)
	document.onmousemove = function(e) { 
		coords = new Array();
		coords = followmouse(e, 10, 10).split("-")
		img.style.left = coords[0] + "px"
		img.style.top = coords[1] + "px"
		img.style.display='block'
	}

	ele.onmouseout = function() {
		ele.onmouseout = ''
		document.onmousemove = ''
		truebody().removeChild(img)
	}
}

function followmouse(ele, start_x, start_y){
	var xcoord = start_x
	var ycoord = start_y
	if (typeof ele != "undefined") {
		xcoord += ele.pageX
		ycoord += ele.pageY
	} else if (typeof window.event !="undefined") {
		xcoord += truebody().scrollLeft + event.clientX
		ycoord += truebody().scrollTop + event.clientY
	}

	return (xcoord+'-'+ycoord)
}



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); };
}

var popupmenuoldonload = window.onload;
window.onload = function() {


}



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;
}

// 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) {
			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 judf_link_gifchange(obj,over){
	
	if (obj){
		obj_img = obj.getElementsByTagName('IMG')[0];
		file = obj_img.src;
		tmp_img= new Image();
		if (over){
			tmp_img.src = file.replace(/2*\.gif/,'2.gif');
		}else{
			tmp_img.src = file.replace(/2*\.gif/,'.gif');
		}
		obj_img.src = tmp_img.src;
	}
}
function aktivieren(element) {
	oldClass = element.className;
	element.className = oldClass+' activate';
	if (!element.onmouseout) {
		element.onmouseout = function (event) { element.className=oldClass; };
	}
}

function show(bildname){	  
	var kleinbildchen=document.getElementById('kleinbildchen');
	var slogansklein=document.getElementById('slogans_klein');		
	kleinbildchen.style.display="none";
	slogansklein.style.display="none";	
		
		var startpic = document.getElementById('startpic');	  
	
 
		if(startpic)
	{  
	
		
		var startPicsTitles = new Array('Ort vor Arnis in der malerischen Kulturlandschaft Angelns bei Flensburg.<br/><br/>Fotos: Andreas Grosse', 'Bikebrennen im Februar an der Geltinger Bucht in der malerischen Kulturlandschaft Angelns bei Flensburg.<br/><br/>Fotos: Andreas Grosse', 'Weiter Himmel über Sörup in der malerischen Kulturlandschaft Angelns bei Flensburg.<br/><br/>Fotos: Andreas Grosse', 'Bewegte Ostsee vor Norgaardholz in der malerischen Kulturlandschaft Angelns bei Flensburg.<br/><br/>Fotos: Andreas Grosse');
		if(bildname=='erde'){bildslogan=0;}
		if(bildname=='feuer'){bildslogan=1;} 
		if(bildname=='himmel'){bildslogan=2;}
		if(bildname=='wasser'){bildslogan=3;}  
			startpic.firstChild.src=common+'/images/pic_'+bildname+'.jpg';
			startpic.style.display = 'block';
		startpic.firstChild.onmouseover = function(e) { showAlt(startpic.firstChild, startPicsTitles[bildslogan]); }
	}

}	  

function ausblenden(){
	 	var kleinbildchen=document.getElementById('kleinbildchen');
	var slogansklein=document.getElementById('slogans_klein');		
	kleinbildchen.style.display="block";
	slogansklein.style.display="block";	  
	var startpic = document.getElementById('startpic');
	startpic.style.display = 'none';

}