8comic downloader written in casperjs

8comic.js

// Usage: casperjs 8comic.js http://new.comicvip.com/show/cool-1050.html

var casper = require('casper').create({
    pageSettings: {
        webSecurityEnabled: false
    }
});

var pages, currentPage;

casper.start(casper.cli.args[0], function(){
    pages = this.evaluate(function(){
        return document.querySelector("#pageindex").length
    });
});

casper.on('load.finished', function (status) {
    if (status === 'success') {
        var img = this.evaluate(function(){ return document.querySelector("#TheImg").src });
        this.echo(img, 'INFO');
        this.download(img, img.split('/').reverse()[0]);
        currentPage = this.evaluate(function(){ return document.querySelector("#pageindex").selectedIndex });
        if (currentPage === pages -1 ) {
            casper.exit();
        }
        this.then(function(){ this.click('#next') })
    }
});

casper.run();