Highlight a word with jQuery

Question

I basically need to highlight a particular word in a block of text. For example, pretend I wanted to highlight the word "dolor" in this text:

Answer 1

Is it possible to get this above example:

jQuery.fn.highlight = function (str, className)
{
    var regex = new RegExp(str, "g");

    return this.each(function ()
    {
        this.innerHTML = this.innerHTML.replace(
            regex,
            "" + str + ""
        );
    });
};

not to replace text inside html-tags like , this otherwise breakes the page.