/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified 20021006 to fix query string parsing and add case insensitivity */
/* Modified 20070316 to stop highlighting inside nosearchhi nodes */

var spirahellic_hi_sr_flag = true;
var spirahellic_sr_scroll_flag = false;

function highlightWord(node,word) {
    // 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;
            // check if we're inside a "nosearchhi" zone
            checkn = pn;
            while (checkn.nodeType != 9 && 
            checkn.nodeName.toLowerCase() != 'body') { 
            // 9 = top of doc
                if (checkn.className.match(/\bnosearchhi\b/)) { return; }
                checkn = checkn.parentNode;
            }
            if (pn.className != "searchword") {
                hiword = document.createElement("span");
                if (spirahellic_hi_sr_flag) {
                    // 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.className = "searchword";
                    hiword.appendChild(hiwordtext);
                    pn.insertBefore(before,node);
                    pn.insertBefore(hiword,node);
                    pn.insertBefore(after,node);
                    pn.removeChild(node);
                }

                if (!spirahellic_sr_scroll_flag)
                {
                    spirahellic_sr_scroll_flag=true;
                    if (spirahellic_hi_sr_flag) { ScrollToElement(hiword); }
                    else { ScrollToElement(pn); }
                }
            }
        }
    }
}

function googleSearchHighlight() {
    if (!document.createElement) return;
    ref = document.referrer;
    if (ref.indexOf('?') == -1) return;
    qs = ref.substr(ref.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' || qsip[0] == 'p') { // q= for Google, p= for Yahoo
            words = unescape(qsip[1].replace(/\+/g,' ').replace(/%3a/ig,':')).split(/\s+/);
            for (w=0;w<words.length;w++) {
                highlightWord(document.getElementsByTagName("body")[0],words[w]);
            }
        }
    }
}

function ScrollToElement(theElement){

  var selectedPosX = 0;
  var selectedPosY = 0;
              
  while(theElement != null){
    selectedPosX += theElement.offsetLeft;
    selectedPosY += theElement.offsetTop;
    theElement = theElement.offsetParent;
  }

  selectedPosY -= 50;
  if (selectedPosY < 0) selectedPosY = 0;

                                      
 window.scrollTo(selectedPosX,selectedPosY);

}