$(document).ready(function(){  
   var hlaska='';
   $("#newsletter-email").focus(function (e) {if((e.target.value=="Váš emailový kontakt") || (e.target.value=="Ihre E-mail Adresse") || (e.target.value=="Your e-mail contact")) { hlaska=e.target.value; e.target.value=""; } });
   $("#newsletter-email").blur(function (e) { if(e.target.value=="") {e.target.value=hlaska;} });
});