function MemoVar(boutik, trad, lng, charte, page) {
  this.boutik=boutik;
  this.trad=trad;
  this.lng=lng;
  this.charte=charte;
  this.page=page;
  
  this.getLib = MemoVar_getLib;
}

function MemoVar_getLib(xmltag){
  return this.trad.getElementsByTagName(xmltag)[0].firstChild.nodeValue;
}