login:<br><s:textfield name="login" id="login" required="true" cssStyle="width:287px; height:20px;" onblur="this.style.backgroundColor='#F7F5E9'" onfocus="this.style.backgroundColor='#FFFFFF'"/>

$(document).ready(function() {

    var txtLogin = document.getElementById("login");

    txtLogin.addEventListener('blur', event => {
      event.preventDefault();
      alert('Passei aqui!!!')
      txtLogin.focus();
    });

});