php - Are there any way to open a form in a div? -

i have this:

my web has 4 divs, first 1 container , inside 3 divs:

• nav
• content
• footer

i mix web moodle, when put correct login , password, says me hello , name in nav, when put wrong login or password, redirects me new page.

i need that,when put wrong login or password, load page inside content's div.

have use ajaxform? how? there more way this?

i have code form:

<?php if(empty($user->id)) { ?><div id="login">                                 <form method="post" action="<?php echo $cfg->httpswwwroot;?>/login/index2.php">                                         <fieldset>                                         <label for="username">usuario:</label><input type="text" name="username" id="usuario">                                         <label for="password">password:</label><input type="password" name="password" id="password">                                         <br>                                         <input type="submit" value="entrar" />                                         </fieldset>                                 </form></div> <a id="boton4">olvido</a> <?php } else { echo 'hola '.$user->firstname.'(<a href="'.$cfg->wwwroot.'/login/logout.php">salir</a>)'; } ?> 

thank answer!