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JavaScript to achieve Snow (Snow) effect

Source: Internet
Author: User
Tags array sin visibility
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Javascript

Code 1:

<title>happy New year</title>
<body bgcolor= "#ff3300" leftmargin= "0" topmargin= "0" aaad98>
<script language= "JavaScript" >
<!--
N = 100;
Y = new Array ();
X = new Array ();
S = new Array ();
A = new Array ();
B = new Array ();
M = new Array ();
V = (document.layers)? 1:0;
Ih= (document.layers) window.innerHeight:window.document.body.clientHeight;
iw= (document.layers) window.innerWidth:window.document.body.clientWidth;
for (i=0 i < N; i++) {
Y[i]=math.round (Math.random () *ih);
X[i]=math.round (Math.random () *IW);
S[i]=math.round (Math.random () *5+2);
a[i]=0;
B[i]=math.random () *0.1+0.1;
M[i]=math.round (Math.random () *1+1);
}
if (V) {
for (i = 0; i < N; i++)
{document.write ("<layer name= ' sn" +i+ "' left=0 top=0 ' bgcolor= ' #ffffff ' clip= ' 0,0," +m[i]+ "," +m[i]+ "" ></layer ") > ")}
}
else{
document.write (' <div style= ' position:absolute;top:0px;left:0px ">");
document.write (' <div style= ' position:relative ">");
for (i = 0; i < N; i++)
{document.write (' <div id= "si" style= "position:absolute;top:0;left:0;width: ' +m[i]+ '; height: ' +m[i]+ '; background : #ffffff; font-size: ' +m[i]+ ' "></div> ')}
document.write (' </div></div> ');
}
Function Snow () {
var h= (document.layers) window.innerHeight:window.document.body.clientHeight;
var w= (document.layers) window.innerWidth:window.document.body.clientWidth;
var t= (document.layers) Window.pageYOffset:document.body.scrollTop;
var l= (document.layers) window.pageXOffset:document.body.scrollLeft;
for (i=0 i < N; i++) {
Sy=s[i]*math.sin (90*math.pi/180);
Sx=s[i]*math.cos (A[i]);
Y[i]+=sy;
X[I]+=SX;
if (Y[i] > H) {
y[i]=-10;
X[i]=math.round (Math.random () *w);
M[i]=math.round (Math.random () *1+1);
S[i]=math.round (Math.random () *5+2);
}
if (V) {document.layers[' sn ' +i].left=x[i];d ocument.layers[' sn ' +i].top=y[i]+t}
Else{si[i].style.pixelleft=x[i];si[i].style.pixeltop=y[i]+t}
A[i]+=b[i];
}
SetTimeout (' Snow () ', 20);
}
-->
</script>


Code 2:

<body bgcolor= #ee3300 >
<style>
. drop {position:absolute; width:3; FILTER:FLIPV (), Fliph (); font-size:40; Color: #ffffff}
</style>
<script language= "JavaScript" >

Snow = false;   False-rain; True-snow
Snowsym = "*" File://These are the symbols for each
Rainsym = "*" File://You can put images here.
Howmany = File://How many drops/snowflakes?

/**************do not need to change anything below***********/
if (snow) {sym = Snowsym; speed=1; angle=10; Drops=howmany}
Else{sym = Rainsym; speed=30; drops=howmany; angle=6}
Movex =-speed/angle; Movey = speed; Count = 0;

function Moverain () {
for (move = 0; move < drops; move++) {
Xx[move]+=movex; Yy[move]+=mv[move];
hmm = Math.Round (Math.random () *1);
if (Xx[move] < 0) {Xx[move] = maxx+10;}
if (Yy[move] > Maxy) {yy[move] = 10;}
Drop[move].left = Xx[move]
Drop[move].top = Yy[move]+document.body.scrolltop;
}settimeout (' Moverain () ', ' 1 ')}

</script>
<script language= "JavaScript" >

if (document.all) {
drop = new Array (); xx = new Array (); yy = new Array (); MV = new Array ()
ly = "Document.all[\ '"; st = "\].style"
for (make = 0; make < drops; make++) {
document.write (' <div id= ' drop ' +make+ ' class=drop> ' +sym+ ' </div> ');
Drop[make] = eval (ly+ ' drop ' +make+st);
Maxx = document.body.clientwidth-40
Maxy = document.body.clientheight-40
Xx[make] = Math.random () *maxx;
Yy[make] = -100-math.random () *maxy;
Drop[make].left = Xx[make]
Drop[make].top = Yy[make]
Mv[make] = (Math.random () *5) +speed/16;
Drop[make].fontsize = (Math.random () *10) +20;
if (snow) {col = ' white '}else{col = ' white '}
Drop[make].color = col;
}
Window.onload=moverain
}
</script>
</body>

Code 3:

<body bgcolor= #ee3300 >
<script language= "JavaScript1.2" >
<!--
var no = 25;
var speed = 10;
var snowflake = "/xrssfile/2006-8/31/200683122039997.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 = a, 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;
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\ ">document.write (snowflake + "border=\" 0\ "></layer>");
} else {
document.write ("<layer name=\" dot "+ i +" \ "left=\" 15\ ");
document.write ("top=\" 15\ "visibility=\" show\ ">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;\ ">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;\ ">document.write (snowflake + "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 ()", speed);
}
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 ()", speed);
}
if (ns4up) {
Snowns ();
else if (ie4up) {
Snowie ();
}
-->
</script>
</body>



This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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