Adds a favicon for the website next to every external link on the page. Clearly shows when you will be leaving the current site, and where you will be going! (Unfortunately making links longer than expected can result in unwanted overflow on various websites. For example, Google header bar!)

页内标签.user.js

// ==UserScript==
// @name 页内书签
// @namespace www.jjwt.com/
// @description 记录页面的当前位置，可以轻松从其他位置返回
// @include *
// @version 2.1
// @grant none
// ==/UserScript==
function jjwtAddBookMark() {
  if (arguments.length == 2) {
    var bookMarkName = arguments[0];
    var currentYPostion = arguments[1];
  } 
  else {
    var bookMarkName = prompt('请输入书签名', '');
    var currentYPostion = window.pageYOffset;
  }
  if (bookMarkName != null && bookMarkName != '') {
    var ul = document.getElementById('jjwtBookMarkUl');
    var txt = document.createElement('input');
    txt.type = 'text';
    txt.value = bookMarkName;
    var btn = document.createElement('input');
    btn.type = 'button';
    btn.value = 'Go';
    btn.onclick = function (event) {
      window.scrollTo(0, currentYPostion);
    };
    var li = document.createElement('li');
    li.appendChild(txt);
    li.appendChild(btn);
    ul.appendChild(li);
  }
}
function jjwtInitBookMark() {
  jjwtAddStyle();
  if (!document.getElementById('jjwtBookMark')) {
    var bookmark_div = document.createElement('div');
    bookmark_div.id = 'jjwtBookMark';
    bookmark_div.onmouseover = mOver;
    bookmark_div.onmouseout = mOout;
    var div_nav = document.createElement('div');
    div_nav.id = 'jjwtBookMarkNav';
    var div_main = document.createElement('div');
    div_main.id = 'jjwtBookMarkMain';
    //增加 "页内标签"
    var h3 = document.createElement('h3');
    h3.className = 'jjwtBookMarkH3';
    h3.innerHTML = '页内标签';
    div_main.appendChild(h3);
    var h3a = document.createElement('h3');
    h3a.className = 'jjwtBookMarkH3';
    h3a.innerHTML = '页内标签';
    div_nav.appendChild(h3a);
    // 增加 "添加书签"按钮
    var btn = document.createElement('input');
    btn.type = 'button';
    btn.value = '增加书签';
    btn.onclick = jjwtAddBookMark;
    div_main.appendChild(btn);
    var ul = document.createElement('ul');
    ul.id = 'jjwtBookMarkUl';
    div_main.appendChild(ul);
    bookmark_div.appendChild(div_nav);
    bookmark_div.appendChild(div_main);
    //增加默认标签
    document.body.appendChild(bookmark_div);
    jjwtAddBookMark('页面顶部', 0);
  };
}
function jjwtAddStyle() {
  if (!document.getElementById('jjwtBookMarkStyle') && window.self == window.top) {
    //先检查要建立的样式表ID是否存在，防止重复添加
    var style = document.createElement('style');
    style.type = 'text/css';
    style.id = 'jjwtBookMarkStyle';
    style.innerHTML = '#jjwtBookMark{' +
    'display:block;' +
    'position:fixed;' +
    'right:0px;' +
    'z-index:99999;' +
    'width:20px;' +
    'overflow:hidden;' +
    'top:220px;' +
    'visibility:visible;' +
    'font-size:12px;' +
    'background-color:#F1FEDD;' +
    'text-align:left !important;' +
    'word-break:break-all;' +
    '} ' +
    '#jjwtBookMarkNav{' +
    'width: 10px;' +
    'float: left;' +
    'word-break:break-all;' +
    '} ' +
    '#jjwtBookMarkMain{' +
    'float: left;' +
    'position: absolute;' +
    'left: 20px;' +
    'word-break:break-all;' +
    '} ' +
    '.jjwtBookMarkH3{' +
    'width: 50%;' +
    'cursor: pointer;' +
    'outline: 0px none;' +
    'text-index: 0.5em;' +
    'border-top: 1px solid #FBFBFB;' +
    'border-bottom: 1px solid #F2F1F1;' +
    'background-color: #F6F6F6;' +
    'float: left;' +
    'padding: 0px;' +
    'margin: 0px;' +
    'word-break:break-all;' +
    '} ' +
    '#jjwtBookMarkUl{' +
    'width: 90%;' +
    'float: left;' +
    'padding: 8px 0px;' +
    'margin-left: 2px;' +
    'overflow: hidden;' +
    'list-style: none outside none;' +
    'font-size:12px;' +
    'text-align:left !important;' +
    '} ' +
    '.jjwtBookMarkLi{' +
    'width: 47%;' +
    'height: 26px;' +
    'float: left;' +
    'margin: 2px;' +
    'list-style: none outside none;' +
    'padding: 0px;' +
    '} ';
    document.body.appendChild(style);
  };
};
function mOver() {
  document.getElementById('jjwtBookMark').style.width = '220px';
  document.getElementById('jjwtBookMark').style.height = '500px';
}
function mOout() {
  document.getElementById('jjwtBookMark').style.width = '20px';
  document.getElementById('jjwtBookMark').style.height = '80px';
}
jjwtInitBookMark();