// JavaScript Document
function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag) 
{
	// the highlightStartTag and highlightEndTag parameters are optional
	if ((!highlightStartTag) || (!highlightEndTag)) 
	{
		highlightStartTag = "<font style='color:red; background-color:yellow;'>";
		highlightEndTag = "</font>";
	}
  
	// find all occurences of the search term in the given text,
	// and add some "highlight" tags to them (we're not using a
	// regular expression search, because we want to filter out
	// matches that occur within HTML tags and script blocks, so
	// we have to do a little extra validation)
	var newText = "";
	var i = -1;
	var lcSearchTerm = searchTerm.toLowerCase();
	var lcBodyText = bodyText.toLowerCase();
	
	var thesame = new Array();
	thesame['ć'] = 'c';
	thesame['ś'] = 's';
	thesame['ł'] = ';';
	thesame['ń'] = 'n';
	thesame['ü'] = 'u';

	for(var key in thesame)
	{
		lcSearchTerm = lcSearchTerm.replace(key, thesame[key]);
		lcBodyText = lcBodyText.replace(key, thesame[key]);
	}
    
	while (bodyText.length > 0) 
	{
		i = lcBodyText.indexOf(lcSearchTerm, i+1);
		if (i < 0) 
		{
			newText += bodyText;
			bodyText = "";
		} 
		else 
		{
			// skip anything inside an HTML tag
			if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) 
			{
				// skip anything inside a <script> block
				if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) 
				{
					newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
					bodyText = bodyText.substr(i + searchTerm.length);
					lcBodyText = bodyText.toLowerCase();
					i = -1;
				}
			}
		}
	}
  
	return newText;
}

function highlightSearchTerms(searchText, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag)
{
	var bodyText = document.getElementById('articlesbox').innerHTML;
	
	// if the treatAsPhrase parameter is true, then we should search for 
	// the entire phrase that was entered; otherwise, we will split the
	// search string so that each word is searched for and highlighted
	// individually
	if (treatAsPhrase)
	{
		searchArray = [searchText];
	}
	else
	{
		searchArray = searchText.split(" ");
	}
	
	if (!document.body || typeof(document.body.innerHTML) == "undefined")
	{
		if (warnOnFailure) 
		{
			alert("Sorry, for some reason the text of this page is unavailable. Searching will not work.");
		}
		return false;
	}
	
	for (var i = 0; i < searchArray.length; i++)
	{
		bodyText = doHighlight(bodyText, searchArray[i], highlightStartTag, highlightEndTag);
	}
	
	document.getElementById('articlesbox').innerHTML = bodyText;
	return true;
}