***图形特效***雪景
把下列代码加到网页的<body></body>标签之间 从google下载我的照片管理软件--------------------------------------------------------------------------------
脚本说明:
把如下代码加入<body>区域中
<script language="javascript1.2">
<!-- begin
var no = 12; // number of hearts
var speed = 10; // smaller number moves the hearts faster
var heart = "5.gif";
var flag;
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();
amx = new array();
amy = new array();
stx = new array();
sty = new array();
flag = new array();
for (i = 0; i < no; ++ i) {
dx = 0; // set coordinate variables
xp = math.random()*(doc_width-30)+10;// set position variables
yp = math.random()*doc_height;
amy = 12+ math.random()*20; // set amplitude variables
amx = 10+ math.random()*40;
stx = 0.02 + math.random()/10; // set step variables
sty = 0.7 + math.random(); // set step variables
flag = (math.random()>0.5)?1:0;
if (ns4up) { // set layers
if (i == 0) {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
document.write("top=\"15\" visibility=\"show\"><img src=\"");
document.write(heart+ "\" border=\"0\">http://code.ik8.com/html/\</layer>");
} else {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
document.write("top=\"15\" visibility=\"show\"><img src=\"");
document.write(heart+ "\" border=\"0\">http://code.ik8.com/html/\</layer>");
}
} else
if (ie4up) {
if (i == 0) {
document.write("<div id=\"dot"+ i +"\" style=\"position: ");
document.write("absolute; z-index: "+ i +"; visibility: ");
document.write("visible; top: 15px; left: 15px;\"><img src=\"");
document.write(heart+ "\" border=\"0\">http://code.ik8.com/html/\</div>");
} else {
document.write("<div id=\"dot"+ i +"\" style=\"position: ");
document.write("absolute; z-index: "+ i +"; visibility: ");
document.write("visible; top: 15px; left: 15px;\"><img src=\"");
document.write(heart+ "\" border=\"0\">http://code.ik8.com/html/\</div>");
}
}
}
function snowns() {// netscape main animation function
for (i = 0; i < no; ++ i) {// iterate for every dot
if (yp > doc_height-50) {
xp = 10+ math.random()*(doc_width-amx-30);
yp = 0;
flag=(math.random()<0.5)?1:0;
stx = 0.02 + math.random()/10;
sty = 0.7 + math.random();
doc_width = self.innerwidth;
doc_height = self.innerheight;
}
if (flag)
dx += stx;
else
dx -= stx;
if (math.abs(dx) > math.pi) {
yp+=math.abs(amy*dx);
xp+=amx*dx;
dx=0;
flag=!flag;
}
document.layers["dot"+i].top = yp + amy*(math.abs(math.sin(dx)+dx));
document.layers["dot"+i].left = xp + amx*dx;
}
settimeout("snowns()", speed);
}
function snowie() {// ie main animation function
for (i = 0; i < no; ++ i) {// iterate for every dot
if (yp > doc_height-50) {
xp = 10+ math.random()*(doc_width-amx-30);
yp = 0;
stx = 0.02 + math.random()/10;
sty = 0.7 + math.random();
flag=(math.random()<0.5)?1:0;
doc_width = document.body.clientwidth;
doc_height = document.body.clientheight;
}
if (flag)
dx += stx;
else
dx -= stx;
if (math.abs(dx) > math.pi) {
yp+=math.abs(amy*dx);
xp+=amx*dx;
dx=0;
flag=!flag;
}
document.all["dot"+i].style.pixeltop = yp + amy*(math.abs(math.sin(dx)+dx));
document.all["dot"+i].style.pixelleft = xp + amx*dx;
}
settimeout("snowie()", speed);
}
if (ns4up) {
snowns();
} else if (ie4up) {
snowie();
}
// end -->
</script>
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