JQuery offset #NaN issue

Question

I have a fixed menu bar at top of the page and all menu links are anchor links on the same page. In short, it's a one page website divided in sections with anchor links as menu items.

I am using the javascript below for smooth slide to section when menu items are clicked.

$(document).ready(function() {
    $("a.anchorLink").anchorAnimate()
});

jQuery.fn.anchorAnimate = function(settings) {

    settings = jQuery.extend({
        speed : 1100
    }, settings);   

    return this.each(function(){
        var caller = this
        $(caller).click(function (event) {  
            event.preventDefault()
            var locationHref = window.location.href
            var elementClick = $(caller).attr("href")

            var destination = $(elementClick).offset().top-60;
            $("html:not(:animated),body:not(:animated)").animate({ scrollTop: destination}, settings.speed, function() {
                window.location.hash = elementClick-60
            });
            return false;
        })
    })
}

Since the top menu height is 60 pixels, I need to subtract it from offset().top to ensure slide works properly. I also have to subtract in location hash else there is a jerky slide (in FF and IE, works fine in Chrome) once the slide on click in complete.

It works great but the problem is the URL is shown as http://www.site.com/#NaN instead of http://www.site.com/#linkname

Here is the full code - http://jsfiddle.net/85saK/1/. Unfortunately, it won't show you the URL after click which ends with #NaN instead of the actual link ID, e.g #store, #home or #contact.

Answer 1

Try:

var destination = $(elementClick).offset().top -60;
$("html:not(:animated),body:not(:animated)").animate({ scrollTop: destination}, settings.speed, function() {
    //window.location.hash = elementClick
    elementClick
});