网页下雪特效代码可复制(js下雪特效代码)
请教网页飘雪的插景，布满整个页面（不是背景）怎么制作
点击编辑窗口左下角的“HTML”选项卡，即出现源代码窗口，将特效代码粘贴进去即可。
这里有代码~
网页飘雪花的代码是什么
在后台添加js特效可实现这样的效果。
js代码为：
script language="JavaScript"
!--
var no = 5; //雪片数目
var speed = 20; //飘动速度。(值越大越慢)
var ns4up = (document.layers) ? 1 : 0; //当前浏览器类型，如果是NS则为1
var ie4up = (document.all) ? 1 : 0; //当前浏览器类型，如果是IE则为1
var s, x, y, sn, cs;
var a, r, cx, cy;
var i, doc_width = 800, doc_height = 600;
x = new Array();
y = new Array();
r = new Array();
cx = new Array();
cy = new Array();
s = 8; //每次下落的高度，越小越平滑，但是也越慢
if (ns4up) { //以NS兼容方式
doc_width = self.innerWidth; //取页面宽度
doc_height = self.innerHeight; //取页面高度
}
else
if (ie4up) { //以IE兼容方式
doc_width = document.body.clientWidth; //取页面宽度
doc_height = document.body.clientHeight; //取页面高度
}
for (i = 0; i no; ++ i) { //根据前面定义的雪片数目写进相应数目的层
initSnow(); //随机初始化层的坐标
if (ns4up) { //如果浏览器是NS
//用layer作为雪片(星号)的容器
document.write("layer name=\"dot"+ i +"\" left=\"1\" ");
document.write("top=\"1\" visibility=\"show\"font color=\"red\"");
document.write("*/font/layer");
}
else
if (ie4up) { //如果浏览器是IE
//用div作为雪片的容器
document.write("div id=\"dot"+ i +"\" style=\"POSITION: ");
document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
document.write("visible; TOP: 15px; LEFT: 15px;\"font color=\"red\"");
document.write("*/font/div");
}
}
//初始化雪片，生成随机坐标
function initSnow() {
a = 6;
r[i] = 1;
sn = Math.sin(a);
cs = Math.cos(a);
cx[i] = Math.random() * doc_width + 1;
cy[i] = Math.random() * doc_height + 1;
x[i] = r[i] * sn + cx[i];
y[i] = cy[i];
}
//计算雪花位置，从新位置上出现，看起来就像是新产生的一样。
function makeSnow() {
r[i] = 1;
cx[i] = Math.random() * doc_width + 1;
cy[i] = 1;
x[i] = r[i] * sn + cx[i];
y[i] = r[i] * cs + cy[i];
}
//雪花下落的计算
function updateSnow() {
r[i] += s;
x[i] = r[i] * sn + cx[i];
y[i] = r[i] * cs + cy[i];
}
//在NS浏览器上处理雪片下落的主程序
function SnowdropNS() {
for (i = 0; i no; ++ i) { //依次处理每片雪花
updateSnow(); //下落
if ((x[i] = 1) || (x[i] = (doc_width - 20)) || (y[i] = (doc_height - 20))) { //如果超出屏幕范围
makeSnow(); //则调整雪片到新位置上
doc_width = self.innerWidth; //更新页面宽度数据
doc_height = self.innerHeight; //更新页面高度数据
}
document.layers["dot"+i].top = y[i]; //改变层的Y坐标，应用新的位置
document.layers["dot"+i].left = x[i]; //改变层的X坐标，应用新的位置
}
setTimeout("SnowdropNS()", speed);
}
//在IE浏览器上处理雪片下落的主程序
function SnowdropIE() {
for (i = 0; i no; ++ i) { //依次处理每片雪花
updateSnow(); //下落
if ((x[i] = 1) || (x[i] = (doc_width - 20)) || (y[i] = (doc_height - 20))) { //如果超出屏幕范围
makeSnow(); //则调整雪片到新位置上
doc_width = document.body.clientWidth; //更新页面宽度数据
doc_height = document.body.clientHeight; //更新页面高度数据
}
document.all["dot"+i].style.pixelTop = y[i]; //改变层的坐标，应用新的位置
document.all["dot"+i].style.pixelLeft = x[i];
}
setTimeout("SnowdropIE()", speed); //准备下一次下落过程。
}
if (ns4up) { //如果是NS
SnowdropNS(); //调用SnowdropNS使雪片下落
}
else
if (ie4up) { //如果是NS
SnowdropIE(); //调用SnowdropIE使雪片下落
}
--
/script
说明：可以根据自己的需求根据说明进行相应参数的修改
HTML下雪代码
head
/head
BODY bgcolor="#000000"
SCRIPT language=JavaScript1.2
var snowsrc="images/xuehua1.gif"
var no = 10;
var ns4up = (document.layers) ? 1 : 0; // browser sniffer
var ie4up = (document.all) ? 1 : 0;
var dx, xp, yp; // coordinate and position variables
var am, stx, sty; // amplitude and step variables
var i, doc_width = 800, doc_height =600;
if (ns4up) {
doc_width = self.innerWidth;
doc_height = self.innerHeight;
} else if (ie4up) {
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
for (i = 0; i no; ++ i) {
dx[i] = 0; // set coordinate variables
xp[i] = Math.random()*(doc_width-50); // set position variables
yp[i] = Math.random()*doc_height;
am[i] = Math.random()*20; // set amplitude variables
stx[i] = 0.02 + Math.random()/10; // set step variables
sty[i] = 0.7 + Math.random(); // set step variables
if (ns4up) { // set layers
if (i == 0) {
document.write("layer name=\"dot"+ i +"\" left=\"50\" top=\"50\" visibility=\"show\"img src='"+snowsrc+"' border=\"0\"/a/layer");
} else {
document.write("layer name=\"dot"+ i +"\" left=\"50\" top=\"50\" visibility=\"show\"img src='"+snowsrc+"' border=\"0\"/layer");
}
} else if (ie4up) {
if (i == 0) {
document.write("div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"img src='"+snowsrc+"' border=\"0\"/a/div");
} else {
document.write("div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"img src='"+snowsrc+"' border=\"0\"/div");
}
}
}
function snowNS() { // Netscape main animation function
for (i = 0; i no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = self.innerWidth;
doc_height = self.innerHeight;
}
dx[i] += stx[i];
document.layers["dot"+i].top = yp[i];
document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowNS()", 10);
}
function snowIE() { // IE main animation function
for (i = 0; i no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
dx[i] += stx[i];
document.all["dot"+i].style.pixelTop = yp[i];
document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowIE()", 10);
}
if (ns4up) {
snowNS();
} else if (ie4up) {
snowIE();
}
/SCRIPT
/body
/html
记得给我加分啊
var snowsrc="images/xuehua1.gif"这句是你雪花图片的地址
求网页飘雪花源代码
把下列代码加到网页的Body/Body标签之间
html
head
title:::飘雪花效果:::网页特效代码:::失落网家园;/title
/head
BODY bgcolor="#000000"
SCRIPT language=JavaScript1.2
var snowsrc="img/snow.gif"
var no = 10;
var ns4up = (document.layers) ? 1 : 0; // browser sniffer
var ie4up = (document.all) ? 1 : 0;
var dx, xp, yp; // coordinate and position variables
var am, stx, sty; // amplitude and step variables
var i, doc_width = 800, doc_height =600;
if (ns4up) {
doc_width = self.innerWidth;
doc_height = self.innerHeight;
} else if (ie4up) {
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
for (i = 0; i no; ++ i) {
dx[i] = 0; // set coordinate variables
xp[i] = Math.random()*(doc_width-50); // set position variables
yp[i] = Math.random()*doc_height;
am[i] = Math.random()*20; // set amplitude variables
stx[i] = 0.02 + Math.random()/10; // set step variables
sty[i] = 0.7 + Math.random(); // set step variables
if (ns4up) { // set layers
if (i == 0) {
document.write("layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"a href=\"\"img src='"+snowsrc+"' border=\"0\"/a/layer");
} else {
document.write("layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"img src='"+snowsrc+"' border=\"0\"/layer");
}
} else if (ie4up) {
if (i == 0) {
document.write("div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"a href=\"\"img src='"+snowsrc+"' border=\"0\"/a/div");
} else {
document.write("div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"img src='"+snowsrc+"' border=\"0\"/div");
}
}
}
function snowNS() { // Netscape main animation function
for (i = 0; i no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = self.innerWidth;
doc_height = self.innerHeight;
}
dx[i] += stx[i];
document.layers["dot"+i].top = yp[i];
document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowNS()", 10);
}
function snowIE() { // IE main animation function
for (i = 0; i no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
dx[i] += stx[i];
document.all["dot"+i].style.pixelTop = yp[i];
document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowIE()", 10);
}
if (ns4up) {
snowNS();
} else if (ie4up) {
snowIE();
}
/SCRIPT
table border="0" width="100%" cellpadding="0"
tr
td width="100%"font color="#ffffff" size="2"b飘雪花效果/b注意保存这个图片（img border="1" src="img/snow.gif" width="16" height="17"）/font/td
/tr
tr
td width="100%"
/table
script language="JavaScript" type="text/javascript" src="js.js"/scripttr/body
/html