Problem on Ipad with JS

Hi All,

Hope you are doing well.

We are executing javascript when timeline start of every slide and calling Background image through it, see the detail .JS

document.body.style.backgroundImage = "url('BG_v1.png')";
document.body.style.backgroundSize = "cover";
document.body.style.backgroundRepeat = "no-repeat";
document.body.style.overflow = "hidden";

It is working fine on Desktops and laptops we are not facing any kind of issue.

When it comes to iPad and Tablets seek bar and background image which we called from .JS won't work.

TIA, hope I will get a solution ASAP.