function rechInit() {
  var texte = "rechercher";
	
  if (!document.getElementById("champ_recherche")) return false;
    document.getElementById("champ_recherche").onfocus = function() {
      if (this.value == texte) {
        this.value = "";
      }
    }
    document.getElementById("champ_recherche").onblur = function() {
      if (this.value == "") {
        this.value = texte;
      }
    }
}
function newsletterInit() {
  var texte2 = "insérer votre email";
	
  if (!document.getElementById("mail_newsletter")) return false;
    document.getElementById("mail_newsletter").onfocus = function() {
      if (this.value == texte2) {
        this.value = "";
      }
    }
    document.getElementById("mail_newsletter").onblur = function() {
      if (this.value == "") {
        this.value = texte2;
      }
    }
}