// JavaScript Document

var Floaters = {
    
    delta: 0.08,
    
    queue: null,
    
    collection: {},
    
    items: [],
    
    addItem: function(Obj,left,top,ani)
    {
        Obj.style['top'] = top + 'px';
        Obj.style['left'] = left + 'px';
        var newItem = { object:Obj, oLeft:left, oTop:top }; 
        this.items[this.items.length] = newItem;
        this.delta = ani ? ani : this.delta;
    },
    
    sPlay: function()
    {
        this.collection = this.items;   
        this.queue = setInterval('play()',10);
    }
}


function checkStandard()
{
    var scrollY;
    if (document.documentElement && document.documentElement.scrollTop)
    {
        scrollY = document.documentElement.scrollTop;
    }
    else if (document.body)
    {
        scrollY = document.body.scrollTop;
    }   
    return scrollY;
}



function play()
{
    var diffY = checkStandard();
    for(var i in Floaters.collection)
    {
        var obj = Floaters.collection[i].object;
        var obj_y = Floaters.collection[i].oTop;
        var total = diffY + obj_y;
        if( obj.offsetTop != total)
        {
            var oy = (total - obj.offsetTop) * Floaters.delta;
                oy = ( oy>0?1:-1 ) * Math.ceil( Math.abs(oy) );
            obj.style['top'] = obj.offsetTop + oy + 'px';
        }else
        {
            clearInterval(Floaters.queue);
            Floaters.queue = setInterval('play()',10);
        }
    }
}