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850天前<html> |
<head> |
<script type="text/javascript"> |
(function() { |
function j(a, b, c) { |
if (a.addEventListener) a.addEventListener(b, c, false); |
else a.attachEvent && a.attachEvent("on" + b, c) |
} |
function f(a) { |
if (typeof window.onload != "function") window.onload = a; |
else { |
var b = window.onload; |
window.onload = function() { |
b(); |
a() |
} |
} |
} |
function g() { |
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 k() { |
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 h(a) { |
this.parent = document.body; |
this.createEl(this.parent, a); |
this.size = Math.random() * 5 + 5; |
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 = g().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 = 2 + Math.random() |
} |
var i = false; |
f(function() { |
i = true |
}); |
window.createSnow = function(a, b) { |
if (i) { |
var c = []; |
setInterval(function() { |
b > c.length && Math.random() < b * 0.0025 && c.push(new h(a)); |
for (var e = g().top, l = k(), d = c.length - 1; d >= 0; d--) if (c[d]) if (c[d].top < e || c[d].top > e + l) { |
c[d].remove(); |
c.splice(d, 1) |
} else { |
c[d].move(); |
c[d].draw() |
} |
}, |
40); |
j(window, "scroll", |
function() { |
for (var e = c.length - 1; e >= 0; e--) c[e].draw() |
}) |
} else f(function() { |
createSnow(a, b) |
}) |
}; |
h.prototype = { |
createEl: function(a, b) { |
this.el = document.createElement("img"); |
this.el.setAttribute("src", b + "snow" + Math.floor(Math.random() * 4) + ".gif"); |
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.top < 0) this.top = this.maxTop; |
else if (this.top > this.maxTop) this.top = 0; |
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) |
} |
} |
})(); |
</script> |
</head> |
<body bgcolor="#999999"> |
<script> |
//使用方法 |
createSnow('...........', 60);//修改为自己的雪花图片存放目录，文件形式为snow1.gif snow2.gif ...... |
</script> |
</body> |
</html> |
初级程序员
by: 程序猿M 发表于：2012-11-17 17:59:35 顶(1) | 踩(0) 回复
怎么我的总是显示的是方块，路径也对啊
网友回复
回复小蜜锋 ： 看最后那几行使用方法： createSnow('...........', 60);//修改为自己的雪花图片存放目录，文件形式为snow1.gif snow2.gif ......
顶(0) 踩(0) 2012-11-21 12:48:00
小蜜锋 ： 例如：createSnow('./image', 60); //image文件夹里放着snow1.gif snow2.gif...等文件
顶(0) 踩(0) 2012-11-21 12:51:05
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