我依旧喜欢折腾浏览器...

编码可以是一种工作，也可以是一种娱乐。
在工作之余，每个人都有自己放松的方式，玩电动，打游戏，看书，听音乐...
我也一样，喜欢看看电影，玩玩游戏，听听音乐放松自己。
不过，在某些时候，编码也可以是一种娱乐。娱乐的工具，一个记事本，一个浏览器... 你可以狠狠的折腾浏览器，发泄你心中的不满。

【可玩度不高的娱乐货】

<!DOCTYPE HTML>
<html>
<head>
<title>follow mouse</title>
<meta name="Author" content="hongru.chen" />
<style type="text/css">
html {
overflow: hidden;
}
body {
position: absolute;
height: 100%;
 100%;
margin:0;
padding:0;
}
#screen {
background:#000;
position: absolute;
 100%;
height: 100%;
}
#screen span {
background: #fff;
font-size: 0;
overflow: hidden;
 2px;
height: 2px;
}
</style>
  <script type="text/javascript"> 
var Follow = function () {
var $ = function (i) {return document.getElementById(i)},
addEvent = function (o, e, f) {o.addEventListener ? o.addEventListener(e, f, false) : o.attachEvent('on'+e, function(){f.call(o)})},
OBJ = [], sp, rs, N = 0, m;
var init = function (id, config) {
this.config = config || {};
this.obj = $(id);
sp = this.config.speed || 4;
rs = this.config.animR || 1;
m = {x: $(id).offsetWidth * .5, y: $(id).offsetHeight * .5};
this.setXY();
this.start();
}
init.prototype = {
setXY : function () {
var _this = this;
addEvent(this.obj, 'mousemove', function (e) {
e = e || window.event;
m.x = e.clientX;
m.y = e.clientY;
})
},
start : function () {
var k = 180 / Math.PI, OO, o, _this = this, fn = this.config.fn;
OBJ[N++] = OO = new CObj(null, 0, 0);
for(var i=0;i<360;i+=10){
var O = OO;
for(var j=10; j<35; j+=1){
var x = fn(i, j).x,
y = fn(i, j).y;
OBJ[N++] = o = new CObj(O , x, y);
O = o;
}
}
setInterval(function() {
for (var i = 0; i < N; i++) OBJ[i].run();
}, 16);
}
}
var CObj = function (p, cx, cy) {
var obj = document.createElement("span");
this.css = obj.style;
this.css.position = "absolute";
this.css.left = "-1000px";
this.css.zIndex = 1000 - N;
document.getElementById("screen").appendChild(obj);
this.ddx = 0;
this.ddy = 0;
this.PX = 0;
this.PY = 0;
this.x = 0;
this.y = 0;
this.x0 = 0;
this.y0 = 0;
this.cx = cx;
this.cy = cy;
this.parent = p;
}
CObj.prototype.run = function () {
if (!this.parent) {
this.x0 = m.x;
this.y0 = m.y;
} else {
this.x0 = this.parent.x;
this.y0 = this.parent.y;
}
this.x = this.PX += (this.ddx += ((this.x0 - this.PX - this.ddx) + this.cx) / rs) / sp;
this.y = this.PY += (this.ddy += ((this.y0 - this.PY - this.ddy) + this.cy) / rs) / sp;
this.css.left = Math.round(this.x) + 'px';
this.css.top = Math.round(this.y) + 'px';
}
return init;
}();
</script></head>
<body>
<div id="screen"></div>
<script type="text/javascript">
new Follow('screen', {speed: 4,
animR : 2,
fn : function (i, j) {
return {
x : j/4*Math.cos(i),
y : j/4*Math.sin(i)
}
}})
  </script></body>
</html>

<!DOCTYPE HTML>
<html>
<head>
<title>follow mouse</title>
<meta name="Author" content="hongru.chen">

<style type="text/css">
html {
    overflow: hidden;
}
body {
    position: absolute;
    height: 100%;
     100%;
    margin:0;
    padding:0;
}
#screen {
    background:#000;
    position: absolute;
     100%;
    height: 100%;
}
#screen span {
    background: #fff;
    font-size: 0;
    overflow: hidden;
     2px;
    height: 2px;
}
</style>

<script type="text/javascript">

var Follow = function () {
    var $ = function (i) {return document.getElementById(i)},
        addEvent = function (o, e, f) {o.addEventListener ? o.addEventListener(e, f, false) : o.attachEvent('on'+e, function(){f.call(o)})},
        OBJ = [], sp, rs, N = 0, m;

    var init = function (id, config) {
        this.config = config || {};
        this.obj = $(id);
        sp = this.config.speed || 4;
        rs = this.config.animR || 1;
        m = {x: $(id).offsetWidth * .5, y: $(id).offsetHeight * .5};

        this.setXY();
        this.start();
    }
    init.prototype = {
        setXY : function () {
            var _this = this;
            addEvent(this.obj, 'mousemove', function (e) {
                e = e || window.event;
                m.x = e.clientX;
                m.y = e.clientY;
            })
        },
        start : function () {
            var k  = 180 / Math.PI, OO, o, _this = this, fn = this.config.fn;
            OBJ[N++] = OO = new CObj(null, 0, 0);
            for(var i=0;i<360;i+=10){
                var O = OO;
                for(var j=10; j<35; j+=1){
                    var x = fn(i, j).x,
                        y = fn(i, j).y;
                    OBJ[N++] = o = new CObj(O , x, y);
                    O = o;
                }
            }
            setInterval(function() {
                for (var i = 0; i < N; i++) OBJ[i].run();
            }, 16);
        }
    }

    var CObj = function (p, cx, cy) {
        var obj = document.createElement("span");
        this.css = obj.style;
        this.css.position = "absolute";
        this.css.left = "-1000px";
        this.css.zIndex = 1000 - N;
        $("screen").appendChild(obj);
        this.ddx = 0;
        this.ddy = 0;
        this.PX  = 0;
        this.PY  = 0;
        this.x   = 0;
        this.y   = 0;
        this.x0  = 0;
        this.y0  = 0;
        this.cx  = cx;
        this.cy  = cy;
        this.parent = p;
    }
    CObj.prototype.run = function () {
        if (!this.parent) {
            this.x0 = m.x;
            this.y0 = m.y;
        } else {
            this.x0 = this.parent.x;
            this.y0 = this.parent.y;
        }
        this.x = this.PX += (this.ddx += ((this.x0 - this.PX - this.ddx) + this.cx) / rs) / sp;
        this.y = this.PY += (this.ddy += ((this.y0 - this.PY - this.ddy) + this.cy) / rs) / sp;
        this.css.left = Math.round(this.x) + 'px';
        this.css.top  = Math.round(this.y) + 'px';
    }

    return init;
}();
</script>
</head>

<body>
    <div id="screen"></div>
<script type="text/javascript">
    new Follow('screen', {speed: 4,
                        animR : 2,
                        fn : function (i, j) {
                            return {
                                x : j/4*Math.cos(i),
                                y : j/4*Math.sin(i)
                            }
                        }})
</script>
</body>
</html>

你可以改改实例化的参数fn，看看有木有其他的图形出现。
这里有个常用的数学函数公式传送门：http://www-history.mcs.st-andrews.ac.uk/Curves/Curves.html
感兴趣的童鞋可以看下。