function send_mail(wdw){
 var eml_obj  = trim(wdw.document.getElementById('eml_obj').value);
 var eml_name = trim(wdw.document.getElementById('eml_name').value);
 var eml_from = trim(wdw.document.getElementById('eml_from').value);
 var eml_body = trim(wdw.document.getElementById('eml_body').value);

 if (eml_obj == '')
  {alert("Le sujet de l'email n'est pas valide");}
 else if (!EmailIsValid(eml_from))
  {alert("L'e-mail n'est pas valide");}
 else if (eml_body == '')
  {alert("Vous n'avez pas mis de texte");}
 else
  {wdw.location.href = 'contact.php?obj=' + eml_obj + '&name=' + eml_name + '&from=' + eml_from + '&body=' + eml_body;};
}

function EmailIsValid(email){
 var verif = /^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-.]{2,}[.][a-zA-Z]{2,3}$/;
 return (verif.exec(email) != null);
}

function trim(string){
 return string.replace(/(^\s*)|(\s*$)/g,'');
}