Keep Side Navigation Fixed with Scrolling of page

Question

I have a clients website - www.stagecraft.co.uk and they want the navigation on the hire pages (longer page) to still be there at when you scroll the page down. I've had a quick go (not live) with position fixed but in doing so it the leftside navigation is about 200px or so from the top of the window. Any when to get it at the top of the window when scrolling?

Thanks in advance....

Answer 1

You could make it position fixed, only when scrolling has reached a certain point:

$(window).scroll(function() {
    if ($(this).scrollTop() > 200) { //I just used 200 for testing
        $("#tester").css({ "position": "fixed", "top": 0 });
    } else {
        $("#tester").css({ "position": "absolute", "top": "200px" }); //same here
    }               
});

and the CSS for the div is as following:

#tester {
    position: absolute;
    right: 20px;
    top: 200px;
    height: 200px;
    width: 100px;
    background: red;
}