Question

I’ve got 2 HTML files and 1 javascript file, index.html, results.html and file.js

Inside index.html I retrieve user input which is used to do some calculations inside the javascript file. The calculating starts when a button is pressed. Now I want to display the data retrieved from index.html to display on results.html so when pressing the button it should run the function and go to another page.

It all works fine to calculate and show the results on 1 page, but I don’t know how to display the results on results.html.

This is how a piece of the code looks:

function berekenKoolBehoefte(){
    koolBehoefte = (energieBehoefte - (eiwitBehoefte * 4) - vetBehoefte) / 4;
    toonKool();
}

function toonKool(){
    var uitkomstKool = document.getElementById("uitkomstKool");
    uitkomstKool.innerHTML = (koolBehoefte * 4).toFixed(1) + " kcal" + " " +     koolBehoefte.toFixed(1) + " gram"
}
bereken.addEventListener('click', berekenKoolBehoefte, false);

This displays all on 1 page, know function toonKool() should be display inside results.html

Answer 1

I think you’d better:

1) Create form on your page aroud the button.

2) On form submit do calculations and put result to hidden field in the form (Or post all fields for calculation to server side). Then all arguments that you want to pass would be accessible on server on second page.

3) Display second page using GET or POST argument from previous.

Cookies is something that you may forgot to clear and it’s much harder to manage them.

Calculation in iframe is much worse then using ajax. You may use ajax for partial load the second page, then all javascript variables would remain.