body.scoll-off {
position: fixed;
width: 100%;
overflow-y: scroll;
}
scrollWidth = window.innerWidth - document.documentElement.clientWidth;
if (scrollWidth > 1) {
$('<style type="text/css">')
.html('.is-compensate-for-scrollbar { padding-right: ' + scrollWidth + 'px; }')
.appendTo('head');
}