gistfile1.j

- (String) highlight_text:(String)input_string {
     if (search_string !== '') { //search_string id defined before
         var regex = new RegExp(search_string, 'ig');
         var start_index = input_string.search(regex);
         var new_substring = '<strong>' + intput_string.substring(start_index, search_string.length) + '</strong>';
        return input_string(0, start_index) + new_substring + input_string(search_string.length + start_index, input_string.length);
     } else {
         return '';
     }
 }