vipsha wrote:
I am filling form "a" in website a.com, when I submit this form
data should transfer to website b.com and the form "b" will be fill up
automatically
Pick the data saved by a.com database and fill the fields in b.com!
Even if you are assuming a case where two webpages are open. One with a.com and other with b.com, the moment you fill a.com and submit, b.com forms autofill:
Keep a continous timer on b.com to check if data exists in DB, the moment a.com saves in DB, fetch it internally and fill b.com.
Though the question asked and expected is weird.