data-href scroll problem error

i try the code from http://support.semicolonweb.com/forums/topic/data-href-scroll-problem/.
i put it after the functions.js include:

...
	
	

    jQuery(document).ready( function(){
        setTimeout(function() {
            if (location.hash) {
                window.scrollTo(0, 0);
            }
        }, 1);
    });
 
    jQuery(window).on('load', function(){
        var divScrollToAnchor = window.location.hash;
 
        if( typeof divScrollToAnchor !== 'undefined' ) {
            var t = setTimeout( function(){
                $('html,body').stop(true).animate({
                    'scrollTop': $( divScrollToAnchor ).offset().top - 100
                }, 700, 'easeOutQuad');
            }, 1000);
        }
    });

but i get JS error in browser-console: TypeError: $(...).offset(...) is undefined

console says error is on that line: 'scrollTop': $( divScrollToAnchor ).offset().top - 100

by the way: i can't edit my post, this error message appear : You do not have a License for data-href scroll problem error to Create a New Topic. Please Purchase or Renew License.