<form action="paginas/login.php">

<p id="log">Usuário: </p> <input id="cmpG" type="text" name="usuario"/>

<p id="log">Senha: </p> <input id="cmpG" type="password" name="senha" size=8 maxlength=8/>

<p id="log">A senha deve conter 08 caracteres (alfanumerico)</p>

<!-- Barra de botões -->

<div id="barra">

<input id="bnt" type="submit" value="Login"/></a>

<input id="bnt" type="reset" value="Limpar"/>

</div>

</form>

<form action="paginas/cadastrar.php">

<BUTTON >Cadastrar</BUTTON>

</form>

<BUTTON onclick="window.location.href='paginas/cadastrar.php'">Cadastrar</BUTTON>

<!--https://pt.stackoverflow.com/q/85554/101