var initialsubj="Interessante Seite für Lehrlinge";
var initialmsg="Hallo Freunde, \n ich habe eine interessante Seite für Lehrstellen und Topinfos gefunden! \n http://www.lehrberuf.info/";
var good = true;
var showed = false;

function checkEmailAddress(field) {
var goodEmail = field.value.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\.info)|(\.sex)|(\.biz)|(\.aero)|(\.coop)|(\.museum)|(\.name)|(\.pro)|(\..{2,2}))$)\b/gi);
if (!goodEmail) {
	if (!showed){
		alert('Bitte gültige e-Mail eingeben.');
	}
	showed = true;
	field.focus();
	field.select();
	good = false;
}
}

u = window.location;

function mailThisUrl() {
var toaddress = '';
var found = 0;
if (document.eMailer.email1.value) {
	checkEmailAddress(document.eMailer.email1);
	toaddress = toaddress + document.eMailer.email1.value + ', ';
	found = 1;
}
if (document.eMailer.email2.value) {
	checkEmailAddress(document.eMailer.email2);
	toaddress = toaddress + document.eMailer.email2.value + ', ';
	found = 1;
}
if (document.eMailer.email3.value) {
	checkEmailAddress(document.eMailer.email3);
	toaddress = toaddress + document.eMailer.email3.value + ', ';
	found = 1;
}
if (document.eMailer.email4.value) {
	checkEmailAddress(document.eMailer.email4);
	toaddress = toaddress + document.eMailer.email4.value + ', ';
	found = 1;
}
if (document.eMailer.email5.value) {
	checkEmailAddress(document.eMailer.email5);
	toaddress = toaddress + document.eMailer.email5.value + ' ';
	found = 1;
}

if (good && found) {
	window.location = "mailto:"+toaddress+"?subject="+initialsubj+"&body="+initialmsg;
}
good = true;
found = 0;
}