// *****************************************************************************
function news_filtro( nom, valor ) {
  var url_actual = location.href;
  if( valor == "-1" ){
    var url_nueva = removeParamFromURL( url_actual,nom );
  }
  else {
	  var url_nueva  = addParamToURL(url_actual,nom,valor,true);
  }
  window.location.href = url_nueva;
}