An excellent answer to this question can be found at: http://stackoverflow.com/questions/359788/how-to-execute-a-javascript-function-when-i-have-its-name-as-a-string

I knew you could call a JavaScript function by it’s string name, by using window[‘functionName’], but this does not work for namespace functions.

When you want to call a namespace function by it’s string name you should use the namespace as context, instead of the window object.

<!DOCTYPE html>
<html>
<head>
    <title>General testpage.</title>
    <script src="/Scripts/Kendo/jquery.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        var MyApp = {};
        MyApp.Navigation = {};
        MyApp.Navigation.refreshDataSources = function ()
        {
            alert("Alert from refreshDataSources.");
        };

        // Dynamically calling namespace function by string name:
        MyApp.Navigation["refreshDataSources"]();

        // Dynamically get namespace part and calling a function in this namespace.
        MyApp["Navigation"]["refreshDataSources"]();            
    </script>
</head>
<body>
</body>
</html>

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