What does this code mean?

"+ClosebuttonHtml+"<div>"+AdContentHtml+"</div></div>");

function scall(){
if(!showad){return;}
if (window.screen.width<MinScreenW){
alert(":\n\n"+MinScreenW+",");
showad = false;
document.getElementById("Javascript.LeftDiv").style.display="none";
document.getElementById("Javascript.RightDiv").style.display="none";
return;
}
var Borderpx = ((window.screen.width-PageWidth)/2-AdDivW)/2;
document.getElementById("Javascript.LeftDiv").style.display="";
document.getElementById("Javascript.LeftDiv").style.top=document.body.scrollTop+Toppx;
document.getElementById("Javascript.LeftDiv").style.left=document.body.scrollLeft+Borderpx;
document.getElementById("Javascript.RightDiv").style.display="";
document.getElementById("Javascript.RightDiv").style.top=document.body.scrollTop+Toppx;
document.getElementById("Javascript.RightDiv").style.left=document.body.scrollLeft+document.body.clientWidth-document.getElementById("Javascript.RightDiv").offsetWidth-Borderpx;
}
function hidead()
{
showad = false;
document.getElementById("Javascript.LeftDiv").style.display="none";
document.getElementById("Javascript.RightDiv").style.display="none";
}
window.onscroll=scall;
window.onresize=scall;
window.onload=scall;
What does this paragraph mean?

Mar.04,2021

pick a few clips:

window.onscroll
window.onresize
window.onload

to sum up, judgment is just an advertisement injected into the page.

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