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function k(a, b, c) { | |
if (a.addEventListener) a.addEventListener(b, c, false); | |
else a.attachEvent && a.attachEvent("on" + b, c) | |
} | |
function g(a) { | |
if (typeof window.onload != "function") window.onload = a; | |
else { | |
var b = window.onload; | |
window.onload = function() { | |
b(); | |
a() | |
} | |
} | |
} | |
function h() { | |
var a = {}; | |
for (type in { | |
Top: "", | |
Left: "" | |
}) { | |
var b = type == "Top" ? "Y": "X"; | |
if (typeof window["page" + b + "Offset"] != "undefined") | |
a[type.toLowerCase()] = window["page" + b + "Offset"]; | |
else { | |
b = document.documentElement.clientHeight ? document.documentElement: document.body; | |
a[type.toLowerCase()] = b["scroll" + type] | |
} | |
} | |
return a | |
} | |
function l() { | |
var a = document.body, | |
b; | |
if (window.innerHeight) b = window.innerHeight; | |
else if (a.parentElement.clientHeight) b = a.parentElement.clientHeight; | |
else if (a && a.clientHeight) b = a.clientHeight; | |
return b | |
} | |
function i(a) { | |
this.parent = document.body; | |
this.createEl(this.parent, a); | |
this.size = Math.random() * 5 + 10; | |
this.el.style.width = Math.round(this.size) + "px"; | |
this.el.style.height = Math.round(this.size) + "px"; | |
this.maxLeft = document.body.offsetWidth - this.size; | |
this.maxTop = document.body.offsetHeight - this.size; | |
this.left = Math.random() * this.maxLeft; | |
this.top = h().top + 1; | |
this.angle = 1.4 + 0.2 * Math.random(); | |
this.minAngle = 1.4; | |
this.maxAngle = 1.6; | |
this.angleDelta = 0.01 * Math.random(); | |
this.speed = 4 + Math.random() | |
} | |
var j = false; | |
g(function() { | |
j = true | |
}); | |
var f = true; | |
window.createSnow = function(a, b) { | |
if (j) { | |
var c = [], | |
m = setInterval(function() { | |
f && b > c.length && Math.random() | |
< b * 0.0025 && c.push(new i(a)); ! f && !c.length && clearInterval(m); | |
for (var e = h().top, n = l(), d = c.length - 1; d >= 0; d--) | |
if (c[d]) if (c[d].top < e || c[d].top + c[d].size + 1 > e + n) { | |
c[d].remove(); | |
c[d] = null; | |
c.splice(d, 1) | |
} else { | |
c[d].move(); | |
c[d].draw() | |
} | |
}, | |
40); | |
k(window, "scroll", | |
function() { | |
for (var e = c.length - 1; e >= 0; e--) c[e].draw() | |
}) | |
} else g(function() { | |
createSnow(a, b) | |
}) | |
}; | |
window.removeSnow = function() { | |
f = false | |
}; | |
i.prototype = { | |
createEl: function(a, b) { | |
this.el = document.createElement("img"); | |
this.el.setAttribute | |
("src", b + "http://img14.360buyimg.com/cms/jfs/t700/37/34114547/8984/3d480e43/547eea10Nd1778505.png"); | |
this.el.style.position = "absolute"; | |
this.el.style.display = "block"; | |
this.el.style.zIndex = "99999"; | |
this.parent.appendChild(this.el) | |
}, | |
move: function() { | |
if (this.angle < this.minAngle || this.angle > this.maxAngle) | |
this.angleDelta = -this.angleDelta; | |
this.angle += this.angleDelta; | |
this.left += this.speed * Math.cos(this.angle * Math.PI); | |
this.top -= this.speed * Math.sin(this.angle * Math.PI); | |
if (this.left < 0) this.left = this.maxLeft; | |
else if (this.left > this.maxLeft) this.left = 0 | |
}, | |
draw: function() { | |
this.el.style.top = Math.round(this.top) + "px"; | |
this.el.style.left = Math.round(this.left) + "px" | |
}, | |
remove: function() { | |
this.parent.removeChild(this.el); | |
this.parent = this.el = null | |
} | |
} | |
})(); | |
createSnow("", 100); |
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