2012年12月13日

var s = 0;
var l = 4;
var timer = null;
var isback = false;
W(document).on('mousewheel', function(e) {
    var isTop = document.body.scrollTop == document.documentElement.scrollTop;
    if (isTop && !isback && s < 100 && e.detail < 0) {
        clearTimeout(timer);
        console.log(s, l);
        s += l;
        l++;
        document.body.style.marginTop = s + 'px';
        timer = setTimeout(function() {
            isback = true;
            anim = new Anim(document.body, {
                "margin-top": {
                    "to": 0
                }
            }, 500, Anim.Easing.easeInStrong);
            anim.on('suspend', function(e) {
                s = 0;
                l = 0;
                isback = false
            });
            anim.play();
        }, 50);
    }
});