{
    steam.greenlight: function() {
        $.get("https://steamcommunity.com/sharedfiles/filedetails/?id="+$(this).data("check")).always(function(jqXHR) {
            if (jqXHR && (/toggled" id="VoteUpBtn" onclick="VoteUp\(/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    steam.group: function() {
        $.get("https://steamcommunity.com/profiles/"+$("aside[data-steam-id]").data("steam-id")+"/groups/").always(function(jqXHR) {
            var regexp = new RegExp("href=\"javascript:leaveGroupPrompt\\('"+$(button).data("check")+"',", "g");
            if (jqXHR && regexp.test(jqXHR))
                // true
            else
                // fail
        });
    },
    steam.curator: function() {
        chrome.runtime.sendMessage({receiver: "checker", type: "steam.curator", data: $(button).data("check")}, function(result) {
            if (result) {
                // true
            } else
                // fail
        });
    },
    steam.game.follow: function() {
        chrome.runtime.sendMessage({receiver: "checker", type: "steam.game.follow", data: $(button).data("check")}, function(result) {
            if (result) {
                // true
            } else
                // fail
        });
    },
    steam.game.wishlist: function() {
        chrome.runtime.sendMessage({receiver: "checker", type: "steam.game.wishlist", data: $(button).data("check")}, function(result) {
            if (result) {
                // true
            } else
                // fail
        });
    },
    vk.club: function() {
        $.get("https://vk.com/"+$(button).data("check")).always(function(jqXHR) {
            if (jqXHR && (/id="page_actions_btn"/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    vk.repost: function() {
        var data = $(button).data("check").split(":");
        $.post("https://vk.com/wkview.php", {
            act: "show",
            al: 1,
            al_ad: 0,
            loc: data[0],
            w: "wall-"+data[1]
        }).always(function(jqXHR) {
            if (jqXHR && (/post_share _share_wrap my_share"/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    vk.like: function() {
        var data = $(button).data("check").split(":");
        $.post("https://vk.com/wkview.php", {
            act: "show",
            al: 1,
            al_ad: 0,
            loc: data[0],
            w: "wall-"+data[1]
        }).always(function(jqXHR) {
            if (jqXHR && (/post_like _like_wrap my_like"/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    facebook.page.like: function() {
        $.get("https://www.facebook.com/"+$(button).data("check")).always(function(jqXHR) {
            if (jqXHR && (/\{"likeFollowData":\{[^\}]+"likeStatus":true/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    facebook.page.follow: function() {
        $.get("https://www.facebook.com/"+$(button).data("check")).always(function(jqXHR) {
            if (jqXHR && (/\{"likeFollowData":\{[^\}]+"followStatus":true/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    facebook.post.like: function() {
        $.get("https://www.facebook.com/"+$(button).data("check")).always(function(jqXHR) {
            var contentId = $(button).data("check").replace(/^.*?\/(\d+)$/gm, "$1");
            var regexp = new RegExp("^.*?(\\{\"?isaskquestion\"?:(true|false),\"?ftentidentifier\"?:\""+contentId+"\".*?\\}\\],\\[).*$", "gm");
            if (jqXHR && (/"?hasviewerliked"?:true/).test(jqXHR.replace(/(\r\n|\n|\r)/gm, "").replace(regexp, "$1")))
                // true
            else
                // fail
        });
    },
    twitter.follow: function() {
        $.get("https://twitter.com/"+$(button).data("check")).always(function(jqXHR) {
            if (jqXHR && (/<div class="[^"]+ following[^"]+" data-user-id=/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    twitter.favorite: function() {
        $.get("https://twitter.com/"+$(button).data("check")).always(function(jqXHR) {
            if (jqXHR && (/<div class="tweet[^>]+ favorited/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    twitter.retweet: function() {
        $.get("https://twitter.com/"+$(button).data("check")).always(function(jqXHR) {
            if (jqXHR && (/<div class="tweet[^>]+ retweeted/).test(jqXHR))
                // true
            else
                // fail
        });
    },
    youtube.like: function() {
        setTimeout(function() {
            $.get("https://www.youtube.com/watch?v="+$(button).data("check")+"&random="+md5(new Date().getTime())).always(function(jqXHR) {
                if (jqXHR && ((/like-button-renderer-like-button-clicked yt-uix-button-toggled yt-uix-post-anchor yt-uix-tooltip/).test(jqXHR) || (/"likeStatus":"LIKE"/).test(jqXHR)))
                    // true
                else
                    // fail
            });
        }, 30000);
    },
    youtube.subscribe: function() {
        setTimeout(function() {
            $.get("https://www.youtube.com/watch?v="+$(button).data("check")+"&random="+md5(new Date().getTime())).always(function(jqXHR) {
                if (jqXHR && ((/data-is-subscribed="True"/).test(jqXHR) || (/,"subscribed":true,/).test(jqXHR)))
                    // true
                else
                    // fail
            });
        }, 30000);
    }
}