/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified 20021006 to fix query string parsing and add case insensitivity */
/* dodać: tylko całe wyrazy (??) */

function highlightWord(node, word)
{
  var i;
  // Iterate into this nodes childNodes
  if (node.hasChildNodes) {
    var hi_cn;
    for (hi_cn = 0; hi_cn < node.childNodes.length; hi_cn++) {
      highlightWord(node.childNodes[hi_cn], word);
    }
  }
  // And do this node itself
  if (node.nodeType == 3) { // text node
    tempNodeVal = node.nodeValue.toLowerCase();
    tempWordVal = word.toLowerCase();
    if (tempNodeVal.indexOf(tempWordVal) != -1) {
      pn = node.parentNode;
      if (pn.className != "searchword") {
        // word has not already been highlighted!
        nv = node.nodeValue;
        ni = tempNodeVal.indexOf(tempWordVal);
        // Create a load of replacement nodes
        before = document.createTextNode(nv.substr(0,ni));
        docWordVal = nv.substr(ni, word.length);
        after = document.createTextNode(nv.substr(ni+word.length));
        hiwordtext = document.createTextNode(docWordVal);
        hiword = document.createElement("span");
        hiword.className = "searchword";
        hiword.appendChild(hiwordtext);
        pn.insertBefore(before, node);
        pn.insertBefore(hiword, node);
        pn.insertBefore(after, node);
        pn.removeChild(node);
      }
    }
  }
}

function googleSearchHighlight()
{
  var i;
  if (!document.createElement) return;
  var ref = document.referrer;
  var get = location.href;
  if ((ref.indexOf('?') == -1) && ((get.indexOf('?') == -1))) return;
  var qs = ref.substr(ref.indexOf('?')+1);
  var qsa = qs.split('&');
  for (i = 0; i < qsa.length; i++) {
    var qsip = qsa[i].split('=');
     if (qsip.length == 1) continue;
      if (qsip[0] == 'q' || qsip[0] == 'p') { // q= for Google, p= for Yahoo
      words = unescape(qsip[1].replace(/\+/g,' ')).split(/\s+/);
      for (w = 0; w < words.length; w++) {
        highlightWord(document.getElementsByTagName("body")[0], words[w]);
      }
    }
  }
  /* jeszcze raz to samo, ale z GET */
  qs = get.substr(get.indexOf('?')+1);
  qsa = qs.split('&');
  for (i = 0; i < qsa.length; i++) {
    qsip = qsa[i].split('=');
     if (qsip.length == 1) continue;
      if (qsip[0] == 'q') {
      words = unescape(qsip[1].replace(/\+/g,' ')).split(/\s+/);
      for (j = 0; j < words.length; j++) { 
        words[j] = escape(words[j]);
        // małe litery:
        words[j] = words[j].replace("%B9", "±");
        words[j] = words[j].replace("%E6", "ć");
        words[j] = words[j].replace("%EA", "ę");
        words[j] = words[j].replace("%B3", "ł");
        words[j] = words[j].replace("%F1", "ń");
        words[j] = words[j].replace("%F3", "ó");
        words[j] = words[j].replace("%9C", "¶");
        words[j] = words[j].replace("%BF", "ż");
        words[j] = words[j].replace("%9F", "Ľ");
      }
      for (w = 0; w < words.length; w++) {
        highlightWord(document.getElementsByTagName("body")[0], words[w]);
      }
    }
  }
}
window.onload = googleSearchHighlight;