How to make a div to scroll down with the page using only javascript

Question

I have a div on a landing page, and i want it to scrol down the page when i am scrolling.

i try this:

var sub =document.getElementById("minisite_send_button");

window.onscroll = function (event) {
sub.style.position=fixed;
sub.style.top=200px;
}

but i get this error :

SyntaxError: identifier starts immediately after numeric literal
sub.style.top=200px;

Why am i getting this? And how can i solve this ?

Thanks :)

Answer 1

fixed and 200px is treated as a variables name. You have to put it in quotes.

Just try with:

sub.style.position = 'fixed';
sub.style.top = '200px';