gistfile1.js

addArticleToCart = function(articleId, quantity, opts){
    var opts        = opts          || {},
        success     = opts.success  || function(){},
        failure     = opts.failure  || function(){},
        callback    = opts.callback || function(){},
        scope       = opts.scope    || this;

    Ext.Ajax.request({
        url: p4t.rootPath + '/modules/eprocurement/Cart/addArticle',
        params: {
            csrfi:      p4t.csrf.id,
            article_id: articleId,
            quantity:   quantity
        },
        success: function(response) {
            var response = Ext.decode(response.responseText);

            if (response.success) {
                success.call(scope);
            } else {
                failure.call(scope);
            }
        },
        failure: function() {
            failure.call(scope);
        },
        callback: function(options, success) {
            callback.call(scope, success);
        }
    });
};