function login_val()
{if (document.forms.login_form.login.value.length>0 && document.forms.login_form.pass.value.length>0) document.forms.login_form.submit(); 
else alert('Нужно ввести логин и пароль')
return false;
}
function login_val2()
{if (!document.forms.login_form.login.value.length || !document.forms.login_form.pass.value.length)
return false;
}
document.write('<form onSubmit="return login_val2();" id=login_form method="POST" class=lheader><b>Авторизация</b><div style="font-family: serif; width: 100px;"><input type=text name=login size=9 value="login" onFocus="value=\'\'"><br><input type=password name=pass size=9 value="pass" onFocus="value=\'\'" OnkeyPress="if (window.event.keyCode==13) login_val();"><br>авто<input type="checkbox" name="member_me" value="1"><a href=# onClick="return login_val()">Вход</a></div></form><a href=/user/index.php?part_id=registr>Регистрация</a><br><a href="/user/index.php?part_id=repass_form">Забыли пароль?</a><br>')