How to scroll page elements with the keyboard?

Question

I basically want to achieve the same effect as in Google Reader: when you press \"j\", you are pushed down to the next article and when you press \"k\", you can go back up t

Answer 1

Using onkeyup and use the keyCode to determine the key pressed: http://jsfiddle.net/pimvdb/gzRwN/1/.

document.body.onkeyup = function(e) {
    var code = e.keyCode;
    if(code === 74) { // key code for j
        window.scrollTo(document.body.scrollLeft,
                        document.body.scrollTop + 500);
    }
};