Scusate. Qualcuno riesce a capire l'errore per il quale l'id #all_elem risulta vuoto? Vedete qualche div non chiuso, o qualche tag non chiuso? Grazie!

codice:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Login</title>

<link href="css/login-box.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" href="jQuery/MotionCAPTCHA/jquery.motionCaptcha.0.2.css" type="text/css">

<link href='http://fonts.googleapis.com/css?family=Gochi+Hand|Kameron:400,700' rel='stylesheet' type='text/css'>

</head>

<body>

<div id="all_elem">
<div id="logo"> provatitolo</div>
<div id="trapezio"><div id="titolo">Login</div><div id="text">





<form class="1" name="myform" action = "login.php"  method = "POST"> 
<div id="form">    
       <label for="email">Email</label>
      <input id="email_log" name="email" type="email" required="required" />
     


      <label for="password">Password</label>
      <input name="password_log" type="password" id="password"  />

  
  <center><input type="submit" id="submit" name="submit" value="Login" /></center>
</div>
</form>
</div>
</div> 

<div id="testo">
ciaociao
</div>

<div id="trapezio2"><div id="titolo-1">Sign up</div>
<div id="text-1">
<form  name="register" id="registra" method = "POST">   
       <label for="nome">First name</label>
      <input id="name" name="name" type="text" maxlength="20" x-webkit-speech speech />
      <label for="nome">Last name</label>
      <input id="last" name="last" type="text" maxlength="20" x-webkit-speech speech />
      <label for="email">Email</label>
      <input id="email" name="email" type="email"   />
     </br></br>
     <label for="nome">I live in</label>
      <input name="city" id="city" type="text"  maxlength="20"  x-webkit-speech speech />
     <label for="password">Password</label>
      <input name="password" type="password" id="psw" maxlength="20"/>
      </br></br>
      
     <label for="sex">I am:</label>
      <select name="sex" id="sex" style="font-size:14px;" >
        	 <option value="">Select sex:</option>
       		 <option value="1">Male</option>
             <option value="2">Female</option>
        </select>
      </br></br>
     	<label for="nascita">Birthday: </label>
        <select name="giorno" class="day" id="day" >
        <option value="">Day</option>
	<option value="1">1</option>
    <option value="2">2</option>
    <option value="26">26</option>
    <option value="27">27</option>
    <option value="28">28</option>
    <option value="29">29</option>
    <option value="30">30</option>
    <option value="31">31</option>
	</select>
	<select name="month" id="month" class="month">
	<option value="">Month</option>
    <option value="1">Jan</option>
    <option value="9">Sep</option>
    <option value="10">Oct</option>
    <option value="11">Nov</option>
    <option value="12">Dec</option>
	</select>
	<select name="anno" id="year" class="year">
	<option value="" selected>Year</option>
    <option value="2000">2000</option>
    <option value="1999">1999</option>
    <option value="1936">1936</option>
    <option value="1935">1935</option>
    <option value="1934">1934</option>
    <option value="1933">1933</option>
    <option value="1932">1932</option>
    <option value="1931">1931</option>
    <option value="1930">1930</option>
  	</select>
   
  <input type="button" id="bottone" value="Sign up" /></form>
  <span class="error" style="display:none; color:#FF0000;font-size:12px; "> Please Enter Valid Data</span>
<span class="success" style="display:none;color:#00BF00;font-size:12px;"> Registration Successfully</span>
</div></div>
  <!--<div id="mc">
    

Please draw the shape in the box to submit the form:</p>
    <canvas id="mc-canvas"></canvas>
    <input type="hidden" id="mc-action" value="register.php" />
</div>

<input disabled="disabled" autocomplete="false" type="submit" value="Sign up">
<input type="hidden" id="mc-action" value="register.php" />-->

</div>
</body>
</html>