[SOLVED] Problem with form validation and display of elements in a code

Question

When I press submit button in this code, I am automatically redirected to my browser's home page. It only happens on code playground.
Also, the submit button works fine when I submit an option for the first time, but when I select another option and press the submit button, both the divs become displayed. I want only 1 div to be displayed in the latter case.
Here is the code:
https://code.sololearn.com/W9m4eldwe6cC/?ref=app
Any working solution will be appreciated.

Answer 1

Great work with tables!

In line 16 (HTML),
you should write
onsubmit='showData(); return false;'
In showData function, if(s == 'HTML') add
-> $("#JavaScript").css("display","none");
next, if(s == 'JavaScript') add
-> $("#HTML").css("display","none");
This is done because display: hidden; property not always work with table elements

Answer 2

Problem solved. Thanks @Blue 😃