function linkauf(text1, text2, text3) {
      document.write('<a href="' + 'mailto:' + text1 + '@' + text2 + '.' + text3 + '" style="color:black; text-decoration:none">');
}

function linkzu(text4) {
	document.write('</a>');
}

function chkFormular () {
  if (document.Login.username.value == "glosch") {
      if (document.Login.password.value == "gatow") {
		return true;
	  }
	  else {
		alert("Falsches Login");
		return false;
	  }
	}
	else {
		alert("Falsches Login");
		return false;
	}
}