// JavaScript Document
function pruefen(lttContact){
	if (!lttContact.firstname.value){
		 alert("Please enter your first and last name");
		 lttContact.firstname.focus();
		 return false;
	 }
	if (!lttContact.e_mail.value){
		alert("Please enter your e-mail-address");
	 	lttContact.e_mail.focus();
		return false;
	}
    if (lttContact.e_mail.value.indexOf('@') == -1){
    	alert("Please, control your e-mail-address");
		lttContact.e_mail.focus();
		return false;
	} 
    if (lttContact.e_mail.value.indexOf('.') == -1){
		alert("Please, control your e-mail-address");
		lttContact.e_mail.focus();
		return false;
	}                
    if (!lttContact['ok'].checked)
		{
		alert("Please confirm to have read my privacy-conditions");
		return false;
		}
	if (!lttContact.code.value){
		 alert("Attention. Please copy the secure code.");
		 lttContact.code.focus();
		 return false;
	 }
    return true;
}