snow.js

此源码包含了各种各样的javascript特效

if(navigator.appName=="Netscape") { //detects whether they're using netscape or not
	isNav=true;
	} else {
	isNav=false;
	}
function makeAd(extras) 
{  
 var now = new Date();  
 var magic = now.getTime();
 var snowflake="merry/snow.gif";

if(isNav==true) {
 document.write(extras);
 document.write("?Page=");
 document.write(magic);
 document.write(extras);
 document.write("?Page=");
 document.write(magic);
 document.write("'>");
 document.write("</SCRIPT>");
 document.write("</DIV>");
	}else{
 document.write("<IFRAME noresize SCROLLING=NO HSPACE=0 VSPACE=0 FRAMEBORDER=0 MARGINHEIGHT=0 MARGINWIDTH=0 WIDTH=0 HEIGHT=0>");
 document.write("</IFRAME>");
	}
}




<!-- Original: Altan ([e-mail]) -->
var no=8;
var speed=1;
var snowflake="http://www.oberfly.com/merry/snow.gif";

var ns4up=(document.layers)?1:0;
var ie4up=(document.all)?1:0;
var dx,xp,yp;
var am,stx,sty;
var i,doc_width=800,doc_height=1024;
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;
xp[i]=Math.random()*(doc_width-50);
yp[i]=Math.random()*doc_height;
am[i]=Math.random()*20;
stx[i]=0.02+Math.random()/10;
sty[i]=0.7+Math.random();
if(ns4up){
if(i==0){
document.write("<layer name=\"dot"+i+"\" left=\"15\" ");
document.write("top=\"15\" visibility=\"show\"><img src=\"");
document.write(snowflake+"\" border=\"0\"></layer>");
}else{
document.write("<layer name=\"dot"+i+"\" left=\"15\" ");
document.write("top=\"15\" visibility=\"show\"><img src=\"");
document.write(snowflake+"\" border=\"0\"></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(snowflake+"\" border=\"0\"></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(snowflake+"\" border=\"0\"></div>");
}
}
}
function snowNS(){
for(i=0;i<no;++i){
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()",speed);
}
function snowIE(){
for(i=0;i<no;++i){
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()",speed);
}
if(ns4up){snowNS();}
else if(ie4up){snowIE();}