Possibility of combining Javascript & Formula Language?

I have a web form with the reCaptcha widget on it. I have managed to make this widget mandatory before submitting the form, using a javascript validation (on JS Header) and calling it via html input type button.

The other fields on the form are being validated with formula language on a hotspot button and upon successful submission a url is opened and an agent (on WebQuerySave) which sends this information in an email is run. e.g.

url := “/” + @WebDbName + “/thankyou_gr/thankyou_gr?OpenDocument”;

@If(subject = “0”; @SetField(“ErrorA”; “* Please enter topic”);

@Do(

@Command([FileSave]);

@URLOpen(url)))

Is there a way to call the javascript function in formula language @URLOpen(“javascript my function”) does not work?

Or is there another way to both validate the reCaptcha before submitting and sending the information in an email?

Thanks in advance.