(function() {
	
var toggleImg = function(e) {   
  if (excludeBtn && this.id != excludeBtn) {
    var str_length = Number(this.src.length);
    var str_ident  = this.src.substring((str_length-6), str_length);
    if (str_ident == '_a.jpg') {
      this.src = this.src.replace(/_a.jpg/g, ".jpg");
    } else {
      this.src = this.src.replace(/.jpg/g, "_a.jpg");
    }
  }
}

YAHOO.util.Event.addListener(['lang-de', 'lang-en'], 'mouseover', toggleImg);
YAHOO.util.Event.addListener(['lang-de', 'lang-en'], 'mouseout', toggleImg);

})();