cnodejs 回到顶部脚本

cnodejs_main.js

$(document).ready(function () {
  $('#search_form').submit(function (e) {
    //e.preventDefault();
    search(); 
  });
  
  function search() {
    var q = document.getElementById('q');
    if (q.value) {
      /*
      var hostname = window.location.hostname;      
      var url = 'http://www.google.com/search?q=site:' + hostname + '%20';
      window.open(url + q.value, '_blank');
      */
      return true;
    } else {
      return false;
    }
  } 
  
  var $wrapper = $('#wrapper');
  var $backtotop = $('#backtotop');
  var top = $(window).height() - $backtotop.height() - 90;
  $backtotop.css({ top: top, right: 100 });
  $backtotop.click(function () {
    $('html,body').animate({ scrollTop: 0 });
    return false;
  });
  $(window).scroll(function () {
    var windowHeight = $(window).scrollTop();
    if (windowHeight > 200) {
      $backtotop.fadeIn();
    } else {
      $backtotop.fadeOut();
    }
  });

  $('.topic_content a,.reply_content a').attr('target', '_blank');
});