Scroll to anchor with offset when coming from another page

anchor.js

jQuery(function($) {
  $('a[href*="#"]:not([href="#"])').click(function() {
      var target = $(this.hash);
        $('html,body').stop().animate({
          scrollTop: target.offset().top - 100
        }, 'linear');  
  });    
  if (location.hash){
    var id = $(location.hash);
  }
  $(window).load(function() {
    if (location.hash){
      $('html,body').animate({scrollTop: id.offset().top - 100}, 'linear')
    };
  });
})(jQuery);