javascript - Logging in and getting the data from the cross domain for calculations using Java Script -

i have searched regarding question , haven't found satisfying answer.

may related doesn't have satisfying answer.

how log in remote website , read data logged in page using javascript/jquery/ajax?

firstly want develop web app college academics website. can see website here

now, want create web app takes in register number, username , password (date of birth, phone number) input , send academics site , gets data site , returns web app calculations , display data. webapp should written in javascript , frameworks , of course html , css. should noted data in website of academics gets data in iframe.

to brief, 1) go website 2) capatcha 3) go website 4) fill in username, passwords, captcha etc. 5) login 6) data 7) return values calculations.

i appreciate if cite code examples, tutorials.