function ScopusParser()
{
};

ScopusParser.prototype._parse_results_page = function(url, callback)
{
    var iframe = document.createElement("iframe");
    $(iframe).hide();
    document.body.appendChild(iframe);
    iframe.src = url;
    $(iframe).load(function()
    {
        var articles = [];
        var ibody = $(iframe).contents()[0];

        var select_pages = $(ibody.getElementsByName("resultsPerPage").item(0));
        if(select_pages.val() != 200) {
            select_pages.val(200);
            select_pages.change();
            return;
        }

        $(ibody).find(".resultItemLists li").each(function(index, li)
        {
            var article = {};

            $(li).find(".docTitle a").each(function(index, tag) {
                article.url = tag.href;
                article.title = $(tag).text();
            });

            $(li).find("a[href*='citedby']").each(function(index, tag) {
                article.citations_url = tag.href;
                article.n_citations = parseInt($(tag).text());
            });
            
            $(li).find('.hidden-label').each(function(index, tag) {
                if($(tag).text().indexOf("Year") == 0)
                    article.year = parseInt($.trim($(tag).next().text()));

                if($(tag).text().indexOf("Authors") == 0)
                    article.authors = $.trim($(tag).next().text());

                if($(tag).text().indexOf("Source") == 0)
                    article.source = $.trim($(tag).next().text());
            });

            if(!('n_citations' in article)) {
                article.citations_url = undefined;
                article.n_citations = 0;
            }
            
            article._id = $.md5(article.title + article.authors);

            articles.push(article);
        });

        callback(articles);
        document.body.removeChild(iframe);
    });
}

ScopusParser.prototype.parse = function(url, callback)
{
    if(url === undefined) return;
    //if(url.indexOf("/results/") > 0 || url.indexOf("/search/") > 0)
    this._parse_results_page(url, callback);
}