function preg_quote (str) {
    return (str+'').replace(/([\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!<>\|\:\/])/g, "\\$1");
}

// Returns true if character c is a letter or digit.
var reLetterOrDigit = /[a-zA-Z\d]+/;
function hasLetterOrDigit (s)
{   
    if (reLetterOrDigit.test(s)) {
        return true;
    }
    return false;
}

var nr_lookup = Array();
var nr_ignore = "";var nr_max_links_page = 20;
var nr_min_link_space = 5;
var nr_a_style = " style=\' color: green;\'";


var nr_autolink_dic = Array();
var nr_len=0;

function nr_highlight(nr_source, nr_ignore, nr_search, nr_replace, nr_case_sensitive, nr_num_linkings){
    //alert("nr_highlight called for: " + nr_search + " | to | " + nr_replace);
    var nr_replaces = 0;
    var nr_replacement = "";
    var position = nr_min_link_space;
    var rpos = -1;
    var nr_rei = "i";
    if (nr_case_sensitive) {
        nr_rei = "";
    }
    function nr_handle(nr_a, nr_b, nr_c) {
        if (nr_replaces >= nr_num_linkings) {
            return nr_a;
        }
        position++;
        if (nr_a.charAt(0) == '<' && nr_a.charAt(nr_a.length - 1) == '>') {
            if (nr_a.indexOf("nr_autolink")) {
                position = 0;
            }
            return nr_a;
        }
        if (nr_case_sensitive) {
            rpos = nr_a.indexOf(nr_search);
        }
        else {
            rpos = nr_a.toLowerCase().indexOf(nr_search.toLowerCase());
        }
        if (rpos >= 0) {
            part1 = nr_a.substring(0, rpos);              //part1 shouldn't have any character or digit
            part2 = nr_a.substr(rpos, nr_search.length);  //part2 should be equal to nr_search.toLowerCase()
            part3 = nr_a.substr(rpos + nr_search.length); //part3 shouldn't have any character or digit
            if (hasLetterOrDigit(part1.toString()) || hasLetterOrDigit(part3.toString())) {
                return nr_a;
            }
            cmp1 = part2;
            cmp2 = nr_search;
            if (!nr_case_sensitive) {
                cmp1 = cmp1.toLowerCase();
                cmp2 = cmp2.toLowerCase();
            }
            if(cmp1 == cmp2) {
                if (position > nr_min_link_space) {
                    nr_replaces++;
                    nr_replacement = nr_a.replace(part2, nr_replace.replace(new RegExp(preg_quote(">" + part2 + "<"), nr_rei), ">" + part2 + "<"));
                    return nr_replacement;
                }
            }
        }
        return nr_a;
    }
    var nr_regex_src = nr_ignore + '(<img[^\\u0000]*?>)|(<a[^\\u0000]*?</a>)|(<!--[^\\u0000]*?-->)|(' + preg_quote(nr_search) +'[\\W\\D\\S]{0,2})(?=[\\s<]+)|([\\w\\d]+[\\W\\D\\S]{0,2})(?=[\\s<]+)';
 var nr_regex = new RegExp(nr_regex_src, nr_rei + 'g');
    return {'nr_word':nr_source.replace(nr_regex, nr_handle), 'linkings':nr_replaces};
}
function nr_get_data() {
  var nr_global_cnt = 0;
  var nr_tag = "";
  var nr_tag_iteration = 0;
  var nr_tag_max_replace = 0;
  var nr_tag_replaces = Array();
  var nr_this_pending_replacements = 0;
  for (var i in nr_autolink_dic) {
    nr_this_pending_replacements = nr_autolink_dic[i]['num_linkings'];
    for (t1 in nr_lookup) {
      if (!nr_tag_replaces[t1]) {
        nr_tag_replaces[t1] = Array();
	nr_tag_replaces[t1][0] = 1;
      }
      nr_tag = nr_lookup[t1][0];
      nr_tag_iteration = nr_lookup[t1][1];
      nr_tag_replace = nr_lookup[t1][2];
      var nr_tags = jQuery(nr_tag).get();
      var nr_tag_i = 0;
      for (t2 in nr_tags) {
        if (nr_tag_replaces[t1][t2]) {
          if (nr_tag_replaces[t1][t2] > nr_tag_replace) {
            continue;
          }
        }
        if (!(nr_this_pending_replacements >= 1)) {
          break;
        }
        var nr_word = nr_tags[t2].innerHTML;        nr_highlight_res = nr_highlight(nr_word, nr_ignore, i, "<a name=\"nr_autolink\"  href=\""+nr_autolink_dic[i]['link']+"\""+nr_a_style+"><b>"+i+"</b></a>", nr_autolink_dic[i]['case_sensitive'], nr_this_pending_replacements);
        nr_this_pending_replacements -= nr_highlight_res['linkings'];
        if (nr_highlight_res['linkings']>=1) {
          //alert("Autolinked: " + i);
          nr_tags[t2].innerHTML = nr_highlight_res['nr_word'];
          if (nr_tag_replaces[t1][t2]) {
            nr_tag_replaces[t1][t2] += nr_highlight_res['linkings'];
          }
          else {
            nr_tag_replaces[t1][t2] = nr_highlight_res['linkings'];
          }
        }
        nr_tag_i++;
        if ((nr_tag_iteration > 0) && (nr_tag_i >= nr_tag_iteration)) {
          break;
        }
      }
    }
    if (nr_global_cnt >= nr_max_links_page) {
      break;
    }
    nr_global_cnt += 1;
  }
}
nr_get_data();