How to hide an object in javascript

Here's a way to hide this Html element:

document.getElementById("form-tab-2").style.display = "none";

To test: Access the URL of the page with Google Chrome, then press F12, click the "Console" option, enter the above command on the console and press ENTER.

Aftertypingandenterenter:

ToapplytoyourJavaScriptandmakesurethiselementisnotappearing,putthecodebelowatthebeginningofyourJavaScript:

document.addEventListener("DOMContentLoaded", function(event) {   
    setTimeout(function(){
         document.getElementById("form-tab-2").style.display = "none"; 
    }, 1000);
});