Question

I’d like to submit a form with a custom variable from the prompt() function.

Submitting a form uses the code

document.formname.submit();

But that will just submit the form, what I want is:

var iInvoiceID = prompt("Please enter the invoice ID");
document.formname.submit(); // But it should send iInvoiceID within $_POST aswell

One way could be: after the prompt, set an input type = ‘hidden’ to iInvoiceID‘s value, and then submit the form. But is there a better/cleaner way todo this?

Answer 1

No, the way you suggested,

after the prompt, set an input type = ‘hidden’ to iInvoiceID‘s value, and then submit the form. But is there a better/cleaner way todo this?

Is the best and cleanest of doing what you need.

Edit:
As for your edit, I think document.formname.submitbutton1.click(); should do the job.