//Diverse Elemente bei kleiner Fenstergroesse veraendern
function check_resolution() {

	smallarray = new Array('startpic1', 'startpic2', 'startpic3', 'logo',  'logo_bg', 'start_contactinfo', 'starttopborder_right', 'starttopborder_left', 'startnav', 'leftbackground', 'rightbackground', 'author', 'startbottomborder_left', 'startbottomborder_right', 'bottombar', 'startcontainer', 'container', 'languages');

	if (document.getElementById('startpage')) {
		if (document.body.offsetHeight < 639) {

			for (i=0; i<smallarray.length; i++) {
				if (document.getElementById(smallarray[i])) {
					document.getElementById(smallarray[i]).className = "small1";
				}
			}
			if (document.body.offsetHeight < 590) {
				document.getElementById('bottombar').style.background="url(../common/images/startseite/slogan.gif) no-repeat center bottom #efefef";
				for (i=0; i<smallarray.length; i++) {
					if (document.getElementById(smallarray[i])) {
						document.getElementById(smallarray[i]).className = "small2";
					}
				}
			}

		} else {
			for (i=0; i<smallarray.length; i++) {
				if (document.getElementById(smallarray[i])) {
					document.getElementById(smallarray[i]).className = "";
				}
			}
			if (document.getElementById('bottombar')) {
				document.getElementById('bottombar').style.background="url(../common/images/startseite/slogan3.gif) no-repeat center bottom #efefef";
			}
		}

	}

	/* Nav auf Innenseite raufschieben */
	if (document.getElementById('nav')) {
		if (document.body.offsetHeight < 515) {
			document.getElementById('nav').style.top = "50px";
		} else {
			document.getElementById('nav').style.top = "84px";
		}
	}
}

window.onresize = window.onload = check_resolution;




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;
		}
	}
}

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 (label.charAt(label.length - 1) == '*') {
				label = label.substring(0, label.length - 1).trim();
				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 (obj_input && obj_input[0]) {
					input = obj_input[0];
					error = false;
					if (!input.value || input.value.trim().length==0) {
						error = true;
						errors.push(label + ' nicht eingegeben');
					}
					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);
							}
						}
					}
					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);
}