text: /* export $timerBtn */
  var $timerBtn = (function(){
    var n = 6;
  
  
    var init = function(){
      var $container = $('.main');
      /*
      var $timerBtn = $('<input type="button" value="同意(6s)" disabled>');
      $timerBtn.appendTo($container);
      $container.append($timerBtn);*/
      var DOM = '<input class="timer-button" type="button" value="同意(6s)" disabled> ';
      $container.html(DOM);
      var $btnAgree = $container.find('.timer-button');
      //css内部样式
      /*$btnAgree.css({
      'font-size':'1.2em',
      'height':'60px',
      'width':'200px'
      });*/
      var timer=window.setInterval(function(){
        n--;
        if(n == 0){
          window.clearInterval(timer);
          $btnAgree.removeAttr('disabled');
          $btnAgree.val('同意');
        } else{
          $btnAgree.val('同意 (' +n + 's)');
        }
      },1000);
      $btnAgree.click(function(){
        alert('SPA! 10-timer-button task');
      });
    };
  
    var remove = function(){
      var $btn = $('.main').find('.timer-button');
      $btn.remove();
    };
    return {init:init,remove:remove};
  }());
  
  
  