<div class="block_icons"></div>

$(function () {
      plus = './images/plus.png';
      minus = './images/minus.png';

      function Switchable(classname) {
          function getElementsByClassName(imgclass) {
              if (document.getElementsByClassName) {
                  return document.getElementsByClassName(imgclass);
              } else {
                  var nodes = document.getElementsByTagName('*'),
                      tmp = [];
                  for (var i = 0; i < nodes.length; i++) {
                      if (new RegExp('\\b' + imgclass + '\\b').test(nodes[i].className)) {
                          tmp.push(nodes[i]);
                      }
                  }
                  return tmp;
              }
          }

          function Next(element) {
              var next = element;
              while (next = next.nextSibling)
              if ("innerHTML" in next) return next;
              return element;
          }

          function getCookie(a) {
              var b = document.cookie.match(new RegExp("(?:^|; )" + a.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, "\\$1") + "=([^;]*)"));
              return b ? decodeURIComponent(b[1]) : undefined
          }
          function setCookie(b, f, c) {
              c = c || {};
              var i = c.expires;
              if (typeof i == "number" && i) {
                  var h = new Date();
                  h.setTime(h.getTime() + i * 1000);
                  i = c.expires = h
              }
              if (i && i.toUTCString) {
                  c.expires = i.toUTCString()
              }
              f = encodeURIComponent(f);
              var a = b + "=" + f;
              for (var e in c) {
                  a += "; " + e;
                  var g = c[e];
                  if (g !== true) {
                      a += "=" + g
                  }
              }
              document.cookie = a
          }
          var nodes = getElementsByClassName(classname);
          for (var i = 0; i < nodes.length; i++) {
              var toggler = document.createElement("A");
              toggler.href = "javascript://";
              toggler.id = "toggler" + i;
              toggler.innerHTML = getCookie("toggler" + i) == "hide" ? "<img src='" + plus + "' alt='' />" : "<img src='" + minus + "' alt='' />";
              toggler.onclick = function () {
                  Next(this.parentNode).style.display = getCookie(this.id) == "hide" ? "" : "none";
                  setCookie(this.id, getCookie(this.id) == "hide" ? "show" : "hide", {
                      expires: new Date("01 Jan 2020")
                  });
                  this.innerHTML = getCookie(this.id) == "hide" ? "<img src='" + plus + "' alt='' />" : "<img src='" + minus + "' alt='' />";
              };
              Next(nodes[i]).style.display = getCookie("toggler" + i) == "hide" ? "none" : "";
              nodes[i].appendChild(toggler);
          }
      }

      Switchable("h_block");
});