var delta = 0.15
var collection;
function floaters() {
        this.items = [];
        this.addItem = function(id, x, y, content) {            
            var div = document.getElementById(id);
            if (div != null) return;
            div = document.createElement("<div id=" + id + " style=\"Z-INDEX: 10; POSITION:absolute;width:80px; height:60px;left:" + (typeof (x) == 'string' ? eval(x) : x) + ";top:" + (typeof (y) == 'string' ? eval(y) : y) + "\">");
            div.innerHTML = content;
            window.document.body.appendChild(div);
            var newItem = {};
            newItem.id = id;
            newItem.x = x;
            newItem.y = y;

            this.items[this.items.length] = newItem;
        }
        this.play = function() {
        collection = this.items
        setInterval('play()', 10);
    }
}
function play() {
    var i = 0;
    if (screen.width <= 800) {
        for (i = 0; i < collection.length; i++) {
            collection[i].object.style.display = 'none';
        }
        return;
    }
    var followObj;
    var followObj_x;
    var followObj_y;
    for (i = 0; i < collection.length; i++) {
        followObj = document.getElementById(collection[i].id);        
        followObj_x = (typeof (collection[i].x) == 'string' ? eval(collection[i].x) : collection[i].x);
        followObj_y = (typeof (collection[i].y) == 'string' ? eval(collection[i].y) : collection[i].y);
        if (followObj == null) continue;       
        if (followObj.offsetLeft != (document.body.scrollLeft + followObj_x)) {            
            var dx = (document.body.scrollLeft + followObj_x - followObj.offsetLeft) * delta;
            dx = (dx > 0 ? 1 : -1) * Math.ceil(Math.abs(dx));
            
            followObj.style.left = followObj.offsetLeft + dx;
        }

        if (followObj.offsetTop != (document.body.scrollTop + followObj_y)) {
            var dy = (document.body.scrollTop + followObj_y - followObj.offsetTop) * delta;
            dy = (dy > 0 ? 1 : -1) * Math.ceil(Math.abs(dy));
            followObj.style.top = followObj.offsetTop + dy;
        }
        followObj.style.display = '';
    }
}