function login_submit(f) {

    f['password'].value = MD5(f['password_plain'].value);

    f['password_plain'].value = '';

    return true;

}

function user_change_password(f) {
	min_passwd_length = 5;
    if (f['new_password1_plain'].value.length<min_passwd_length){
    	alert("Minimalna długość hasła to:" + min_passwd_length);
    	return false;
    }
    else {
	    f['old_password'].value = MD5(f['old_password_plain'].value);
	    f['old_password_plain'].value = '';
	
	    f['new_password1'].value = MD5(f['new_password1_plain'].value);
	    f['new_password1_plain'].value = '';
	
	    f['new_password2'].value = MD5(f['new_password2_plain'].value);
	    f['new_password2_plain'].value = '';
	
	    return true;

	}

}