[Vlasenko Fedor]

<img id="badroad" class="notActive" onclick="func(this);" src="/d/718661/t/images/buttons/badroad_btn_1.jpg">
    <img id="badrails" class="notActive" onclick="func(this);" src="/d/718661/t/images/buttons/badrails_btn_1.jpg">
    <img id="baddvor" class="notActive" onclick="func(this);" src="/d/718661/t/images/buttons/baddvor_btn_1.jpg">
    <script>
      var tmp;
      func = function (el) {
        tmp && (tmp.src = tmp.src.replace('2.jpg', '1.jpg'));
        el.src = el.src.replace('1.jpg', '2.jpg');
        tmp = el;
      };
    </script>