JQuery - Smooth scroll to any anchor

smooth_scroll_jquery

    	$window.load(function() {
    		var scrollOffset = ; // Do some padding calculations etc. - this will be substracted from the target item top position
		// Assign to any links/buttons with '#something' in their href.
		$('#nav a').on('click',function(e) {
                    var $href = $(this).attr('href'),
                        hi = $href.indexOf('#');
                    // If no hash part return;
                    if (hi==-1) return true;
                    e.preventDefault();
                    // The double decodeURI is to support non-english
                    var targetid = decodeURI(decodeURI($href.substring(hi)));
                        targetTop = $(targetid).offset().top - scrollOffset;
                    $("html, body").animate({scrollTop: targetTop}, 1000);
                    //Change URL on browser window
                    if (window.history)
                        window.history.pushState(null, "", targetid);
            
                    return false;
		});

                // If URL contains anchor - auto scroll to it:
                var $hash = window.location.hash;
                if ($hash) {
                    $hash = $hash.replace(/\s/g,'-');
                    var targetid = $hash;
                        targetTop = $(targetid).offset().top - scrollOffset;
                    $("html, body").animate({scrollTop: targetTop}, 1000);
                    //Change URL on browser window
                    if (window.history)
                        window.history.pushState(null, "", targetid);
                    
                }
	});