https://www.onlinepersianas.com.br/octopus/js/zen_mouse.js

1(function(global) {
2
3var data  = [imgsPath + "ico_processing.gif", 16, 16]
4  , rpos  = [15, 15]
5  , queue = []
6  , indicator = new Element("div", { id: "mouseTrail", style: "position:absolute;top:0;left:0;z-index:9999;visibility:hidden;" })
7  , img = new Element("img", { src: data[0], width: data[1], height: data[2], alt: "spinner" })
8;
9
10indicator.adopt(img);
11document.body.adopt(indicator);
12
13global.loading = {
14
15    start: function(id) {
16        queue.push(id);
17        indicator.setStyle("visibility", "");
18    },
19
20    stop: function(id) {
21        queue.remove(id);
22        if( queue.length <= 0 ) indicator.setStyle("visibility", "hidden");
23    }
24
25};
26
27document.addEvent("mousemove", function(ev) {
28    ev = new Event(ev);
29
30    var x = rpos[0] + ev.page.x;
31    var y = rpos[1] + ev.page.y;
32
33    if(x + data[1] > bW() + rX() - rpos[0] - data[1]) x = bW() + rX() - rpos[0] - data[1];
34    if(y + data[2] > bH() + rY() - rpos[1] - data[2]) y = bH() + rY() - rpos[1] - data[2];
35
36    sX(indicator,x);
37    sY(indicator,y);
38});
39
40}(this));