/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified 20021006 to fix query string parsing and add case insensitivity */
/* Modified 20060112 by benn to handle phrases within quotation marks in the search query*/
/* Modified 20060112 by benn to fix bug with leading spaces in query*/

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++) {
			/* ------------------------------------------------ */
			/* To ignore areas of the page, add conditions here */
			/* ------------------------------------------------ */
			if(node.childNodes[hi_cn].className!='nohighlight')
			{
				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 SearchHighlight(blnSearchResult){
  //alert(blnSearchResult)
  if(blnSearchResult){
		if (!document.createElement) return;
		ref = document.location.href;
		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
			{ 
				query = unescape(qsip[1].replace(/\+/g,' '))
		    }
		}


  }else{
    //alert("YES")
    var query = ""
		// get the query from the referrer
		if (!document.createElement) return;
		ref = document.referrer;
		//alert(ref)
		if (ref.indexOf('?') == -1){
		//alert("here")
  		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
  			{ 
  				query = unescape(qsip[1].replace(/\+/g,' '))
  		    }
  		}  
    }

    if(query==""){ 
      //alert("GO")
  	
  		ref = document.location.toString();
  		//alert(ref)
  		if (ref.indexOf('?') == -1) return;
  	//	alert("GOT HERE")
  		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
  			{ 
  				query = unescape(qsip[1].replace(/\+/g,' '))
  		    }
  		}  
    }


		
  }
  
	//alert(query);
	// take the query and turn it into a word list with | character seperating word.
	// phrases in quotes are handled and treated as a single "word" for the purposes of highlighting.
	var inphrase=false
	var wordlist=''
	for(l=0;l<=query.length;l++)
	{
		letter = query.charAt(l)
		if(letter=='"')
		{
			if(inphrase) {inphrase=false} else {inphrase=true} // a quote was found.  don't add it to the word list, but flip the inphrase indicator.
		}
		else if(letter==' ')
		{
			if(inphrase) {wordlist = wordlist + ' '} else {wordlist = wordlist + '|'} // a space was found, if we are in a phrase, add the space otherwise add the word delimiter |
		}	
		else
		{
			wordlist = wordlist + letter // a normal letter was found, just add it
		}
	}

	words = wordlist.split('|');
	for (w=0;w<words.length;w++)
	{
		word = words[w].replace(/^\s*|\s*$/g,""); // trim spaces 
		if(word !='') {
				highlightWord(document.getElementsByTagName("body")[0],word)
		}
    }
            	
}