function truebody() {
	return document.getElementsByTagName('body')[0]
}
window.addEvent('load', function(){
	resetActive('');
});
function resetActive(activeElement)
{
		$$('.ma_item').each(function(item)
			{
			   if($(activeElement))
			   {
			   	if(item.id == activeElement)
				{
					item.style.display = 'block';
				}
				else
				{
					item.style.display = 'none';
				}
			   }
			   else
 			   {
			   	if(item.className=='ma_item active')
				{
					item.style.display = 'block';
				}
				else {
					item.style.display = 'none';
				}
			 }
		});			
}

var moves = 0;

function changeActiveMa(thumbelement,thumbimage,source)
{
	if(moves == 0) { // change first image back to normal
		$$('.ma_overview_image').each(function(item) {
			item.firstChild.onmouseout();
		});

		moves++;
	}

	blankimage = common + '/images/cover.jpg';
	swapImage(thumbelement, blankimage);	
	//$(source).style.display ='block';
	resetActive(source);
}

function resetActiveMa(thumbelement,thumbimage,source)
	{	
		 swapImage(thumbelement, thumbimage);
		 //$(source).style.display ='none';
		 resetActive('');

	}

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); };
}

// 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";
	x = Math.random();
	fenster = window.open(url, 'win', attrib);
	return false;
} 
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;
	}
}

var historicOnload = window.onload;
window.onload = function() {
	var news_text = document.getElementById('news_text');
	if(news_text)
	{
		var children = news_text.getElementsByTagName('div');
		var countChildren = 0;

		for(i=0; i<children.length; i++)
		{
			if(children[i].className == 'entity')
			{
				countChildren++;
			}
		}

		var chosenChild = Math.floor(Math.random() * countChildren);
		countChildren = 0;

		for(i=0; i<children.length; i++)
		{
			if(children[i].className == 'entity')
			{
				if(countChildren == chosenChild)
				{
					children[i].style.display = 'block';
				}

				countChildren++;
			}
		}
	}

	if(historicOnload)
		historicOnload();
}

function hideSelectBoxes(){
    selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) { selects[i].style.visibility = "hidden";}
}

function showSelectBoxes(){
    selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) { selects[i].style.visibility = "visible";}
}