Get scrollbar width function

function getScrollbarWidth() {
    var outer, inner, widthScollbar, widthNoScrollbar;

    outer = $('<div>', {
        id: '__outer',
        css: {
            'visibility': 'hidden',
            'width': '100px'
        }
    }).appendTo('body');

    widthScollbar = outer.outerWidth();
    // force scrollbars
    outer.css('overflow', 'scroll');

    inner = $('<div>', {
        id: '__outer',
        style: {
            'width': '100%'
        }
    }).appendTo('#__outer');

    // add innerdiv
    widthNoScrollbar = inner.outerWidth();

    console.log(widthScollbar, widthNoScrollbar);
    // remove divs
    outer.remove();

    return widthNoScrollbar - widthScollbar;
}

$('body').text('ScrollbarWidth: ' + getScrollbarWidth() );