Besoin d'aide sur un formulaire

Bonjour,

J'ai réalisé un formulaire pour un site que je suis entrain de créer. Je ne connais rien au langage html, mais je me forme petit à petit.
Bref, après quelques heures de recheches j'ai réussi à faire le formulaire que je désirai! Cependant il y a deux points qui me résistent et je ne parviens pas à trouver la solution!

1 : Comment rendre les champs désirés obligatoires ?
2 : Comment faire pour que l'utilisateur m'envoie bien le formulaire? (j'essaye mais rien ne se passe)

Par avance merci de votre aide!

Voici le code:

<p>
<script src="Form.js" language="Javascript"><!--
<span style="font-size: small; font-family: trebuchet ms,geneva;" mce_style="font-size: small; font-family: trebuchet ms,geneva;"></span>
// --></script>
</p>
<form onsubmit="return testForm(this)" name="form1"></form><form></form>
<p><form></form></p>
<p style="TEXT-ALIGN: center"><strong><span style="text-decoration: underline;"><span style="font-size: small; font-family: trebuchet ms,geneva;">Questionnaire bilan perte de poids :</span></span></strong></p>
<p style="PADDING-LEFT: 30px"><span style="font-size: small; font-family: trebuchet ms,geneva;"><strong><span style="text-decoration: underline;">Renseignements</span></strong></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Civilité* : <input name="civRX" value="Mr" type="radio" />Mr <input name="civRX" value="Mme" type="radio" />Mme <input name="civRX" value="Mlle" type="radio" />Mlle<br />Nom* : </span><input name="nomRS" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Prénom* : </span><input name="prenomRS" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Date de naissance* : </span><input name="dateRD" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Adresse* : </span><input name="adresseRS" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Code postal* : </span><input name="codeRE" size="6" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Ville* : </span><input name="villeRS" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Téléphone : </span><input name="telephoneXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Fax : </span><input name="faxXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Mobile : </span><input name="mobileXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">E-mail* : </span><input name="emailRM" size="25" /></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;"></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Taille (cm)* : </span><input name="sizeXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Poids (kg)* : </span><input name="sizeXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;"></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Profession : </span><input name="jobXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Type d'emploi: </span><select name="typejobRX"> <option>Choisissez votre niveau d'activité</option> <option value="1">Sédentaire</option> <option value="2">Semi-sédentaire</option> <option value="3">Dynamique</option></select><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Jours de travail :           <input name="cocheRX" value="checkbox" type="checkbox" /> Lundi        </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Mardi       </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Mercredi   </span></p>
<p><span style="font-size: small;">                      </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Jeudi       </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Vendredi       </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Samedi       </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Dimanche</span></p>
<p style="PADDING-LEFT: 30px"><span style="font-size: small; font-family: trebuchet ms,geneva;"><span style="text-decoration: underline;"><strong>Pratiques sportives</strong></span></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Disciplines : </span><input name="sizeXX" size="100" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Nombre d'entraînements par semaine : <input name="cocheRX" value="checkbox" type="checkbox" /> 1</span>   <span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> 2   </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> 3   </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> 4   </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> 5   </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> 6   </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> 7</span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Durée moyenne des entraînements : </span><input name="sizeXX" size="25" /></p>
<p><span style="font-size: small;">Jours possibles pour effectuer une séance :          <input name="cocheRX" value="checkbox" type="checkbox" /> Lundi       </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Mardi       </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Mercredi</span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">                                                      </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Jeudi        </span><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Vendredi</span>         <span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Samedi</span>          <span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> Dimanche</span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;"></span></p>
<p style="padding-left: 30px;"><span style="font-size: small; font-family: trebuchet ms,geneva;"><strong><span style="text-decoration: underline;">Santé</span></strong></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Maladies & Blessures : </span><input name="jobXX" size="100" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Traitement en cours : </span><input name="jobXX" size="100" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Fumeur : </span><select name="quantityRX"> <option>Choisissez votre consommation journalière</option> <option value="1">0</option> <option value="2">0 à 5</option> <option value="3">5 à 10</option> <option value="4">10 à 20</option> <option value="5">Plus d'un paquet</option></select><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Autres : </span><input name="santeXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;"></span></p>
<p style="padding-left: 30px;"><span style="font-size: small; font-family: trebuchet ms,geneva;"><span style="text-decoration: underline;"><strong>Informations complémentaires</strong></span></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">Tour de poitrine (en cm) : </span><input name="sizeXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Tour de ventre (en cm) : </span><input name="sizeXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Tour de taille (en cm) : </span><input name="sizeXX" size="25" /><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Possedez-vous des rollers : </span><select name="yesornotRX"> <option>Choisissez votre réponse</option> <option value="1">Oui</option> <option value="2">Non</option></select><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Possedez-vous un vélo : </span><select name="yesornotRX"> <option>Choisissez votre réponse</option> <option value="1">Oui</option> <option value="2">Non</option></select><br /><span style="font-size: small; font-family: trebuchet ms,geneva;">Avez-vous la possibilité de nager : </span><select name="yesornotRX"> <option>Choisissez votre réponse</option> <option value="1">Oui</option> <option value="2">Non</option></select></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;"></span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;"><input name="cocheRX" value="checkbox" type="checkbox" /> J'accepte les conditions générales d'utilisation du site*</span></p>
<p><span style="font-size: small; font-family: trebuchet ms,geneva;">(*) Champs obligatoires</span></p>
<p><form></form></p>
<fieldset><legend>champ de sécurité</legend>
<p> </p>
<p><label for="form_secure">
<script src="Contact%20%20Conseils%20Sportifs%20et%20Nutritifs_fichiers/secure.htm" language="javascript"></script>
                                        1  +  1  :</label> <input name="code" id="form_secure" /></p>
<p> </p>
</fieldset>
<p style="text-align: center;"><input name="submit" value="Envoyer" type="submit" /></p>
<p> </p>
<form enctype="text/plain" method="post" action="mailto:freemanmosny@hotmail.fr?subject=demande de contact" name="envoi"></form>