</p><script>
    window.addEventListener('DOMContentLoaded', function() {

        // Get reference to plugin iframe contentWindow

        var f = document.getElementById('pluginFrame').contentWindow;

        // Setup plugin configuration data.
        // (Note: your center will receive an apiKey and regKey(s) upon registering with
        // the eKYROS Call Center in CenterPiece).
        //
        // Parameters:
        // type:              Message type should always be 'ekyros'
        // apiKey:            Identifies Call Center
        // regKeys:           Array that identifies 1 or more registered office locations.
        // themeColor:        Optional. Specify a primary color used by the plug-in to match your
        //                    site's theme.  Default is color 'blue'. Accepts hex value or named color.
        // waitTimeInMinutes: Optional. Specify duration (in minutes) before the user can create
        //                    another appointment.  Default is 30 minutes.

        var data = {
        "type":     'ekyros',
        "apiKey":   '41301EE0-560C-45B3-BC89-CD32C1B2EE36',
        "regKeys":  ['CB124A4C-7679-4F96-84C9-87CEA27F8891','066B9A8A-872C-4E42-8F0A-09F6551B209B','37431EB3-CE82-4FA6-8587-BF1E1A27C8AA'],
        "themeColor": '#86A149',
        "waitTimeInMinutes": 30
        };
    
        // Setup message listener to receive messages from the plugin.
        window.addEventListener("message", function(e){
    
            // Optional. Handle callback message when someone books an appointment
    
            if (e.data.type == 'ekyros') {
    
                // Do something like redirect to google analytics page etc...
                window.location.href='https://my-site/my-google-analytics-page.html';
            }
    
            // Required! Handle initialization.  
            // Param1:   Configuration data.
            // Param2:   Secuity requirement.  Must be origin (domain) used in iframe SRC 
            //           attribute.
    
            if (e.data.type == 'ekyros-init') {
                
                f.postMessage(data, "https://pluslinkplugin.ekyros.com");
            }
        });
});
</script>