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    Browser security rules make tracking goals on cross domains a little tricky for every client-side application, and some custom integration is necessary.

    The only goal type that can be measured on cross domains is the ‘custom’ one.

    Necessary steps:

    Let’s say you have two different domains – domain-one.com and domain-two.com, and you want to set an experiment on domain-one.com which sends the visitors to domain-two.com, and you want to track how many of them convert on domain-two.com.

    In order to do that, on the domain-two.com page, on which you want to track conversions ( for example, domain-two.com/thank-you.html ), you must insert an iframe, in the body of the thank you page, that contains a link to a custom page (conversion.html) hosted on the original domain/website which in this case is domain-one.com.

    The iframe script that must be inserted is the following:

    <iframe src="http://domain-one.com/conversion.html">

    The conversion.html page is a stand-alone HTML page, hosted on the domain-one.com that should contain the following code:

    <html>
        <head>
        <!-- start omniconvert.com code -->
        <link rel="dns-prefetch" href="//app.omniconvert.com">
        <script>
    var _mktz = _mktz || [];
    _mktz.push(['_Goal','Sale','VALUE']); //insert the goal code generated by Omniconvert
        </script>
        <script type="text/javascript" src="//cdn.omniconvert.com/js/YOURID.js"></script>         <!-- end omniconvert.com code --> 
        </head> 
    <body> 
    </body> 
    </html>

    If you need to save a goal value you can pass it via a GET parameter to this iframe. In this case, the URL should look like this: http://domain-one.com/conversion.html?sale=[value]

    Also, the iframe code has to be modified to handle the new parameter:

    <script>
    var urlParams = new URLSearchParams(window.location.search);
    var saleValue = urlParams.get(“sale”);​
    var _mktz = _mktz || [];
    _mktz.push(['_Goal','Sale',saleValue]); //insert the goal code generated by Omniconvert
    </script>

    Attention:  This code must be installed only on the page where you want to track the goal – Eg: the thank you page – NOT on the pages where the experiments are running. Installing it on the pages where experiments are active will stop them from working!