modified epom show_ads.js

show_ads.js

/*
 * Asynchronous loading of ads. 
 * Below is of the top of my head rewrite to load multiple ads at the same time 
 * in a asynchronous fashion.
 *
 * I gave it a quick test run and it seems to work as fare as I can see
 * 
 *
 * var EpomConfig = EpomConfig || {ads : []};
 * (function(){
 *  EpomConfig.ads.push(
 * {
 *     key: "some key",
 *     codeFormat : "ads",
 *     targetId : "topBanner",
 *     click : "",
 *     customParams : {},
 *     height : 250,
 *     width : 760
 *   },
 *   {
 *       key: "some key",
 *       codeFormat : "ads",
 *       targetId : "topBanner",
 *       click : "",
 *       customParams : {},
 *       height : 250,
 *       width : 760
 *   });
 *  var epom = document.createElement('script');
 *  epom.type = 'text/javascript';
 *  epom.async = true;
 *  epom.src = (location.protocol == 'https:' ? 'https:' : 'http:') + '//www.adshost2.com/js/show_ads.js';
 *  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(epom, s);
 * })();
 *
*/

var EpomAdServer = EpomAdServer || {};

EpomAdServer.addCampaignId = function (campaignId) {
    if (typeof this.campaignIds === "undefined") {
        this.campaignIds = campaignId;
    } else {
        this.campaignIds += "," + campaignId;
    }
};

EpomAdServer.getCampaignIds = function () {
    return this.campaignIds || "";
};

EpomAdServer.getEpomCookies = function () {
    if (typeof localStorage !== "undefined" && typeof localStorage.epomCookies !== "undefined") {
        var result = [];
        var params = JSON.parse(localStorage.epomCookies);
        for (var p in params)
            result.push(p + "=" + params[p]);
        return result.join("&");
    }
    return "";
};

var EpomInvokeServer = function EpomInvokeServer(config){
    this.key = config.key;
    this.params = config.params;
    this.width = config.width;
    this.height = config.height;
    this.type = config.codeFormat;
    this.baseUrl = (location.protocol == 'https:' ? 'https:' : 'http:') + '//www.adshost2.com';
    this.targetId = config.targetId;

    if (typeof(config.click) === 'undefined') {
        this.click = "";
    } else {
        this.click = config.click;
    }

    if (typeof(config.params) === 'undefined') {
        this.params = {};
    } else {
        this.params = config.params;
    }

    if (typeof(config.width) !== 'undefined') {
        this.width = config.width;
    }

    if (typeof(config.height) !== 'undefined') {
        this.height = config.height;
    }
}

EpomInvokeServer.prototype = {

    toQueryString : function(params){
        var result = [];
        for (var p in params)
            result.push(p + "=" + params[p]);
        return result.join("&");
    },
    getUrl : function(){
        var els = document.getElementsByTagName('script');
        var el = els[els.length - 1];
        var src = el.src;
        return this.baseUrl + "/" + this.type + "?v=1&key=" + this.key +
            "&click=" + this.click + "&tz=" + (new Date().getTimezoneOffset() / -60) + "&t=" + new Date().getTime() +
            "&" + this.toQueryString(this.params) + '&' + EpomAdServer.getEpomCookies();        
    },

    invokeIframe : function () {
        var iFrame = document.createElement('iframe');
        iFrame.src = this.getUrl();
        iFrame.width = this.width.toString();
        iFrame.height = this.height.toString();
        iFrame.frameBorder = "0";
        iFrame.scrolling = "no";
        document.getElementById(this.targetId).appendChild(iFrame);
    },

    invokeJsSyncCode : function () {
        var e = document.createElement('script'); 
        e.type = 'text/javascript';
        e.async = true;
        e.src = this.getUrl() + "&cIds=" + EpomAdServer.getCampaignIds();
        document.getElementsByTagName('body')[0].appendChild(e);
    },

    invoke: function()
    {
        if(this.type == "ads")
        {
            this.invokeIframe();
        }
        else
        {
            this.invokeJsSyncCode();
        }
    }
}
var EpomConfig = EpomConfig || {ads:[]};
var ads = EpomConfig.ads;
for (var i = 0; i < ads.length; i++) {
    new EpomInvokeServer(ads[i]).invoke();
}