Make all external links target to blank

Stupid little javascript workaround for when you are too lazy to do it in the html. Pretty fast, saves pain.

requires this little function:

function strripos(haystack, needle, offset) {
  //  discuss at: http://phpjs.org/functions/strripos/
  // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // bugfixed by: Onno Marsman
  // bugfixed by: Brett Zamir (http://brett-zamir.me)
  //    input by: saulius
  //   example 1: strripos('Kevin van Zonneveld', 'E');
  //   returns 1: 16

  haystack = (haystack + '')
    .toLowerCase();
  needle = (needle + '')
    .toLowerCase();

  var i = -1;
  if (offset) {
    i = (haystack + '')
      .slice(offset)
      .lastIndexOf(needle); // strrpos' offset indicates starting point of range till end,
    // while lastIndexOf's optional 2nd argument indicates ending point of range from the beginning
    if (i !== -1) {
      i += offset;
    }
  } else {
    i = (haystack + '')
      .lastIndexOf(needle);
  }
  return i >= 0 ? i : false;
}

and the jQuery bit:

jQuery(document).ready(function($) {	
    // add target="_blank" to all *external* 
//create array of all *internal* urls that should NOT go to a separate window
    var internal_urls = Array('domain.tld','127.0.0.1','domain.tld');
    $('a').attr('target',function(){
        var url = $(this).attr('href');
        var target = $(this).attr('target');
        if(url == '#' || strripos(url,'http',0)===false){
            return '_self';
        } else {
            var i=0;
            while (internal_urls[i]){
                if(strripos(url, internal_urls[i], 0)){
                    return target;
                }
                i++;
            }
            return '_blank';
        }
    });
});