Highlight user selected text using javascript
//-------------------------------------------------------
// Name: doHighlight()
// 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)
//-------------------------------------------------------
function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag)
{
    var newText = "";
    var i = -1;
    var lcSearchTerm = searchTerm.toLowerCase();
    var lcBodyText = bodyText.toLowerCase();
    var temp = 0;
    var counter = 0;

//********************************************************************
//********************************************************************
//********************************************************************
//Here is the ID of the <p> element where our text was selected
    alert(textId);
//Here is the text of the ID of the <p> element we selected
     alert(document.getElementById(textId).innerHTML);
//********************************************************************
//********************************************************************
//********************************************************************

    while (bodyText.length > 0)
    {
        i = lcBodyText.indexOf(lcSearchTerm, i++);

        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))
            {
//********************************************************************
//********************************************************************
//********************************************************************
// Writes the document til it reaches the search term, then adds highlightStartTag then the search term then highlightEndTag
// Then writes more of the document until the search term is reached again
// Needs to search for the term based on the id="" given to the <p> element
// Then add the highlightStartTag and highlightEndTag
                newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
                bodyText = bodyText.substr(i + searchTerm.length);
                lcBodyText = bodyText.toLowerCase();
                i = +1;
//********************************************************************
//********************************************************************
//********************************************************************
                }
            }
        }
        //break;
    }
    //newText += bodyText;
    return newText;
}
//-------------------------------------------------------