highlight codes (explained)

<!---SEARCH + HIGHLIGHT CODE BY EURHIPIDES (ELISIONTHEMES)---->
<script>
$.expr[":"].contains = $.expr.createPseudo(function(arg) {
    return function( elem ) {
        return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
    };
}); // this whole piece of code makes the :contain selector case insensitive, so that the search box returns results regardless of upper/lowercase
$(document).ready(function(){
     $('#searchfor').keyup(function() { //when someone types anything in the searchbox
        var key = event.keyCode || event.charCode;
        var searchedText = $('#searchfor').val(); // variable for the text entered into the searchbox
        if( key == 13) { // if they clicked the enter key
            if ($(".content:contains('"+ searchedText +"')").length > 0 ) { //if they clicked the enter key AND the text is found
                $('.noresult').fadeOut(); // then fade OUT the div that says 'no results found'
            }
            else {
                $('.noresult').fadeIn(); // or else fade IN the div that says 'no results found'
            }
        }
     });
});
</script>

     <script style="text/javascript" src="http://static.tumblr.com/9y86jzv/bovnsdesg/highlight.css"></script>

<script>
$(document).ready(function(){
     $('#searchfor').keypress(function (e) { // when someone types something in the searchbox
        var key = e.which;
        var searchedText = $('#searchfor').val(); // variable for the text entered into the searchbox
        if(key == 13) { // if they click the enter key
            $('.content').highlight( searchedText ); // then highlight the found text
        }
     });
});
</script>

<script>
$(document).ready(function(){
     $('#searchfor').keyup(function() { // when someone types something in the searchbox
        var key = event.keyCode || event.charCode;
        if (key == 8 || key == 46) { // if they click the backspace button
            $('.content').removeHighlight(); // then remove the highlight
            $('.noresult').fadeOut(); // or if the text wasnt found, fade out the 'no results' text
        }
     });
});
</script>
<!----END SEARCH + HIGHLIGHT CODES---->