I want to load some data elements into my mbox.js so that I can access them from every mbox.
The satellite calls are'pageName='+_satellite.getDataElement('PageName')
The interface doesn't provide a syntax for multiple parameters.
The way to pass in multiple key/value pairs is to separate them with an & symbol.
So yours would be
return 'pageName='+_satellite.getDataElement('PageName') + '&' + 'formType='+_satellite.getDataElement('FormType');
The best way to test this would be to add this code to your mbox.js file then download the newly created file and use an override in a tool like Charles with MapLocal to make sure your parameters are coming in as you expected.
Hope that helps.