lib/pages.js
function appendUrl(url, urls) {
    var i = urls.length
        found = false;
    while (i--) {
        if (utils.compareUrl(urls[i], url)) 
          found = true; 
    }
    if (found === false && utils.isUrl(url)) 
      urls.push(url);
}
function appendUrl(url, urls) {
    var i = urls.length
        found = false;
    while (i--) {
        if (utils.compareUrl(urls[i], url)) 
          found = true; 
    }
    if (found === false && utils.isUrl(url)) 
      urls.push(url);
}
function appendUrl ( url , urls ) { var i = urls . length found = false ; while ( i -- ) { if ( utils . compareUrl ( urls [ i ] , url ) ) found = true ; } if ( found === false && utils . isUrl ( url ) ) urls . push ( url ) ; }
append a url if it is not already in the urls array
append a url if it is not already in the urls array