a連結アンカーポイント設定スライド遷移

$("a[href*=#]").click(function() {
  if (
    location.pathname.replace(/^\//, "") == this.pathname.replace(/^\//, "") &&
    location.hostname == this.hostname
  ) {
    var $target = $(this.hash);
    $target =
      ($target.length && $target) || $("[name=" + this.hash.slice(1) + "]");
    if ($target.length) {
      var targetOffset = $target.offset().top;
      $("html,body").animate(
        {
          scrollTop: targetOffset
        },
        500
      );
      return false;
    }
  }
});