Two forms - one submit button?

Question

I have TWO forms on my website.

Is it possible when I submit one of these, it will take form data from a particular field in the other form?

I am using the Recurly system with PHP.

Answer 1

You can write your own function.

function submit (){
   document.getElementById("firstform").submit();
   document.getElementById("secondform").submit();
}

You can then make a button that calls this function.

If this doesn't work, try again using ajax. Example