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Highlight Clicked button

it will highlight a tags you clicked.

// ==UserScript==
// @name         Highlight Clicked button
// @namespace    http://tampermonkey.net/sftec
// @version      0.3
// @description  it will highlight a tags you clicked.
// @author       sftec
// @match        *://*/*
// ==/UserScript==

(function() {
var style = document.createElement("style");
style.type = "text/css";
var text = document.createTextNode("a:visited,a:active,a:hover{color:#800000!important;}");
style.appendChild(text);
var head = document.getElementsByTagName("head")[0];
head.appendChild(style);
})();