goTop

function getGroupItems(opts) {

    jQuery.each(imageList, function(i, val) {

          opts.itemArray.push(val);

    });

}



function goTop(acceleration, time) {

    acceleration = acceleration || 0.5;

    time = time || 16;


    var dx = 0;

    var dy = 0;

    var bx = 0;

    var by = 0;

    var wx = 0;

    var wy = 0;


    if (document.documentElement) {

        dx = document.documentElement.scrollLeft || 0;

        dy = document.documentElement.scrollTop || 0;

    }

    if (document.body) {

        bx = document.body.scrollLeft || 0;

        by = document.body.scrollTop || 0;

    }

    var wx = window.scrollX || 0;

    var wy = window.scrollY || 0;


    var x = Math.max(wx, Math.max(bx, dx));

    var y = Math.max(wy, Math.max(by, dy));


    var speed = 1 + acceleration;

    window.scrollTo(Math.floor(x / speed), Math.floor(y / speed));

    if(x > 0 || y > 0) {

        var invokeFunction = "goTop(" + acceleration + ", " + time + ")"

        window.setTimeout(invokeFunction, time);

    }

}



window['goTop'] = goTop;