// ==UserScript==
// @name         点击变色
// @version      0.31
// @description  点击变色并在新窗口打开
// @match        *://*/*
// @author       变异小僵尸
// @namespace https://greasyfork.org/users/85375
// @downloadURL none
// ==/UserScript==
(function() {
    'use strict';
    //变色
    var color = "red";
    var style = 'a:visited{color:'+color+'}';
    addStyle(style)
    var styles = '';
    //获取所有a标签
    var a = document.querySelectorAll('a');
    for (var i = 0; i < a.length; i++) {
        a[i].addEventListener('mousedown', function(e) {
            // e.preventDefault()
            var that = this;
            that.addEventListener('click', function(e) {
                // 判定a标签链接
                if (that.getAttribute('href') == "#" || that.getAttribute('href') == "javascript;;" || that.getAttribute('href') == "javascript:void(0);" || that.getAttribute('href') == "javascript" || that.getAttribute(
                        'href') == "javascript:void(0)") {
                    window.location.href = that.getAttribute('href');
                } else {
                    // 阻止默认点击
                    e.preventDefault()
                    // 再新窗口打开链接
                    window.open(that.getAttribute('href'));
                }
            })
            styles = that.getAttribute('style');
            if (styles != null) {
                styles += ';color:' + color + ';';
            } else {
                styles = 'color:' + color + ';';
            }
            //添加
            that.setAttribute('style', styles);
        })
    }
    //创建style
    function addStyle(string) {
        var style = document.createElement("style");
        style.setAttribute("type", "text/css");
        if (style.styleSheet) { // IE
            style.styleSheet.cssText = string;
        } else { // w3c
            var cssText = document.createTextNode(string);
            style.appendChild(cssText);
        }
        var heads = document.querySelectorAll("head");
        if (heads.length){
          heads[0].appendChild(style);
        }
        else{
          document.documentElement.appendChild(style);
        }
    }
})();