jQuery: script per pulire tutti campi di un form

function clearForm(form) {

  $(':input', form).each(function() {
    var type = this.type;
    var tag = this.tagName.toLowerCase();

    if (type == 'text' || type == 'password' || tag == 'textarea')
      this.value = "";


    else if (type == 'checkbox' || type == 'radio')
      this.checked = false;


    else if (tag == 'select')
      this.selectedIndex = ‐1;
  });
};