CasperJS循环加载下一页

我一直在研究一个脚本，该脚本整理了来自网站的用户列表的分数。一个问题是，我正在尝试在 while 循环中加载下一页，但该函数没有加载......

casper.then(function () {
    var fs = require('fs');
    json = require('usernames.json');
    var length = json.username.length;
    leaderboard = {};
    for (var ii = 0; ii < length; ii++) {
        var currentName = json.username[ii];
        this.thenOpen("http://www.url.com?ul=" + currentName + "&sortdir=desc&sort=lastfound", function (id) {
                return function () {
                    this.capture("Screenshots/" + json.username[id] + ".png");
                    if (!casper.exists(x("//*[contains(text(), 'That username does not exist in the system')]"))) {
                        if (casper.exists(x('//*[@id="ctl00_ContentBody_ResultsPanel"]/table[2]'))) {
                            this.thenEvaluate(tgsagc.tagNextLink);
                            tgsagc.cacheCount = 0;
                            tgsagc.
                            continue = true;
                            this.echo("------------ " + json.username[id] + " ------------");
                            while (tgsagc.
                                continue) {
                                this.then(function () {
                                    this.evaluate(tgsagc.tagNextLink);
                                    var findDates, pageNumber;
                                    pageNumber = this.evaluate(tgsagc.pageNumber);
                                    findDates = this.evaluate(tgsagc.getFindDates);
                                    this.echo("Found " + findDates.length + " on page " + pageNumber);
                                    tgsagc.checkFinds(findDates);
                                    this.echo(tgsagc.cacheCount + " Caches for " + json.username[id]);
                                    this.echo("Continue? " + tgsagc["continue"]);
                                    this.click("#tgsagc-link-next");

                                });
                            }
                            leaderboard[json.username[id]] = tgsagc.cacheCount;
                            console.log("Final Count: " + leaderboard[json.username[id]]);
                            console.log(JSON.stringify(leaderboard));
                        } else {
                            this.echo("------------ " + json.username[id] + " ------------");
                            this.echo("0 Caches Found");
                            leaderboard[json.username[id]] = 0;
                            console.log(JSON.stringify(leaderboard));
                        }

                    } else {
                        this.echo("------------ " + json.username[id] + " ------------");
                        this.echo("No User found with that Username");
                        leaderboard[json.username[id]] = null;
                        console.log(JSON.stringify(leaderboard));
                    }
                });