var getUrlParameter = function getUrlParameter(sParam) { var sPageURL = window.location.search.substring(1), sURLVariables = sPageURL.split('&'), sParameterName, i; for (i = 0; i < sURLVariables.length; i++) { sParameterName = sURLVariables[i].split('='); if (sParameterName[0] === sParam) { return sParameterName[1] === undefined ? true : decodeURIComponent(sParameterName[1]); } } return false; }; var weblang = getUrlParameter('lang'); if (weblang=="fr"){ jQuery('#search-box input').attr('placeholder', 'Rechercher'); }