Re-position scrollable element to child element position based on the off-set of that child element to its parent.
//Determine position of active tab and scroll mobile nav to that position and highlight
function autoScrollNav(nav) {
$(document).ready(function (e) {
var $pageElement = $(nav),
$scrollElement = $(".account-nav-inner"),
offset = $pageElement.offset().left - 15;
$pageElement.addClass("active-nav");
$scrollElement.animate({scrollLeft: offset}, "fast");
});
}