hola.html

<fieldset className="col1">

  <legend>Experiencia Laboral</legend>
  <div className="experiencia-laboral">
    <form  method="post" id="form3">
      <button type="button" name="button" className="button-accordion">+</button>
      <div className="accordion hidden">
        <p id="form-field">Experiencia laboral I</p>
        <label htmlFor="work-type" className="hidden">Cargo</label>
        <input type="text" name="cargo" id="work-type" defaultValue placeholder="Cargo" />
        <label htmlFor="company" className="hidden">Compañía</label>
        <input type="text" name="company" id="company" defaultValue placeholder="Compañía" />
        <label htmlFor="city" className="hidden">Ciudad</label>
        <input type="text" name="city" id="city" defaultValue placeholder="Ciudad" />
        <label htmlFor="city" className="hidden">País</label>
        <input type="text" name="country" id="country" defaultValue placeholder="País" />
        <div className="form-container">
          <div className="form-container-items">
            <label htmlFor="start">Fecha inicio</label> <br />{/*Modifica Sara: desde className="hidden" a className="" */}
            <select className="months"  id="select-5">
            </select>
            <select className="years"  id="select-años-5">
            </select>
          </div>
          <div className="form-container-items">
            <label htmlFor="end">Fecha fin</label> <br />{/*Modifica Sara: desde className="hidden" a className="" */}
            <select className="months"  id="select-6">
            </select>
            <select className="years"  id="select-años-6">
            </select>
          </div>
        </div>
        <label htmlFor="descripcion" className="hidden">Descripción</label>
        <textarea name="name" rows={8} cols={80} defaultValue={""} />
        <button type="reset" name="button" id="reset">Reset</button> <br /><br /><br />

      </div>
    </form>
    <div className="work-extra hidden">
      <hr />
      <p id="form-field">Experiencia laboral II</p>
      <form  method="post" id="form3_bis">
        <label htmlFor="work-type" className="hidden">Cargo</label>
        <input type="text" name="cargo" id="work-type" defaultValue placeholder="Cargo" />
        <label htmlFor="company" className="hidden">Compañía</label>
        <input type="text" name="company" id="company" defaultValue placeholder="Compañía" />
        <label htmlFor="city" className="hidden">Ciudad</label>
        <input type="text" name="city" id="city" defaultValue placeholder="Ciudad" />
        <label htmlFor="city" className="hidden">País</label>
        <input type="text" name="country" id="country" defaultValue placeholder="País" />
        <div className="form-container">
          <div className="form-container-items">
            <label htmlFor="start">Fecha inicio</label> <br />{/*Modifica Sara: desde className="hidden" a className="" */}
            <select className="months"  id="select-7">
            </select>
            <select className="years"  id="select-años-7">
            </select>
          </div>
          <div className="form-container-items">
            <label htmlFor="end">Fecha fin</label> <br />{/*Modifica Sara: desde className="hidden" a className="" */}
            <select className="months"  id="select-8">
            </select>
            <select className="years"  id="select-años-8">
            </select>
          </div>
        </div>
        <label htmlFor="descripcion" className="hidden">Descripción</label>
        <textarea name="name" rows={8} cols={80} defaultValue={""} />
        <button type="reset" name="button" id="reset">Reset</button> <br /><br /><br />
      </form>
    </div>
    <button type="button" name="button" id="paragraph-button-work">Añadir nueva experiencia laboral</button><br /><br />
    <button type="button" name="button" id="button3">Añadir</button>
  </div>


</fieldset>