function formulaire(){document.webcam.city.focus()}
function $(i){
  return document.getElementById(i);
}
function verifVille(that){
  if(that.value.length==0){
      $('erreur_ville').style.display='none';
      $('erreur_code').style.display='none';
      that.className='normal';
  }
  else{
    if(isNaN(that.value)){
      $('erreur_code').style.display='none';
      that.className='normal';
      if(that.value.length<3){
        $('erreur_ville').style.display='block';
        that.className='erreur';
      }
      else{
        $('erreur_ville').style.display='none';
        that.className='normal';
      }
    }
    else{
      $('erreur_ville').style.display='none';
      if(that.value.length<5){
        $('erreur_code').style.display='block';
         that.className='erreur';
      }
      else{
        $('erreur_code').style.display='none';
        that.className='normal';
      }
    }
  }

}
function verifMail(that){
  if(validMail(that.value)){
    that.className="normal";
    $('erreur_mail').style.display='none';
  }
  else{
    that.className="erreur";
    $('erreur_mail').style.display='block';
  }
}
function validMail(mail){
  	var place = mail.indexOf("@",1);
  	var point = mail.indexOf(".",place+1);
  	if ((place > -1)&&(mail.length >2)&&(point > 1)){
  		return true;
  	}
  	else{
  		return false;
  	}
}
function toggle(id){
  var i=$(id);
  if(!i){
    alert(id+" n'existe pas!");
    return false;
  }
  if(i.style.display!="block"){
    i.style.display="block";
  }
  else{
    i.style.display="none";
  }
}