Detect the screen width and set the id to the div width of the frame. Adjust it according to the maximum width of your web page. The maximum width of the small demo is 1440
The code copy is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Unt titled document</title>
<script src="js/jquery.min.js" type="text/javascript"></script>
<script>
function onWidthChange(){
var w=$(window).width();
x=(w-1440)/2;
$("#frame").css("width",w);
if(w<1024){
$("#frame").css("overflow","visible");
$("#webContent").css("margin-left",x);
}else if(1024<w<1440){
$("#frame").css("overflow","hidden");
$("#webContent").css("margin-left",x);
}
setTimeout(onWidthChange,0);
};
</script>
</head>
<body>
<div id="frame" style="overflow:hidden;">
<div id="webContent">
//content
</div>
</div>
</body>
</html>