Sne på hjemmesiden
Sat på siden 23-10-2003
Sne på hjemmesiden er nok et af de mest klassiske JavaScripts. Du behøver blot at indsætte det i <body> på hjemmesiden og gemme et snefnug under navnet "snow.gif". Hvis du ikke har et, kan du finde det på her:
Se sneen dale her: http://www.tips-og-tricks.com/eksempler/jul.html
Koden her skal indsættes i <body>
<!-- Start på sne -->
<script
type="text/javascript">
<!-- Original: Altan (snow@altan.hr) -->
<!-- Web Site:
http://www.altan.hr/snow -->
<!-- Modified By: Homer (homer_adm@yahoo.it) -->
<!-- Web
Site: http://start.at/the_simpsons -->
<!-- Begin
var no = 24; // antal snefnug
var speed = 4; // jo mindre
tal, desto hurtigere falder sneen
var snow = "snowblue.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[i] =
0;
// set coordinate variables
xp[i] = Math.random()*(doc_width-30)+10; //
set position variables
yp[i] = Math.random()*doc_height;
amy[i] = 12+
Math.random()*20; // set
amplitude variables
amx[i] = 10+ Math.random()*40;
stx[i] = 0.02 +
Math.random()/10; // set step variables
sty[i] = 0.7 +
Math.random(); // set step variables
flag[i] =
(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(snow+ "\" border=\"0\"></layer>");
}
else {
document.write("<layer name=\"dot"+ i +"\" left=\"15\"
");
document.write("top=\"15\" visibility=\"show\"><img
src=\"");
document.write(snow+ "\"
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(snow+ "\" 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(snow+ "\"
border=\"0\"></div>");
}
}
}
function snowNS() { // Netscape main animation function
for (i = 0;
i < no; ++ i) { // iterate for every dot
if (yp[i] >
doc_height-50) {
xp[i] = 10+ Math.random()*(doc_width-amx[i]-30);
yp[i] =
0;
flag[i]=(Math.random()<0.5)?1:0;
stx[i] = 0.02 +
Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width =
self.innerWidth;
doc_height = self.innerHeight;
}
if (flag[i])
dx[i]
+= stx[i];
else
dx[i] -= stx[i];
if (Math.abs(dx[i]) > Math.PI)
{
yp[i]+=Math.abs(amy[i]*dx[i]);
xp[i]+=amx[i]*dx[i];
dx[i]=0;
flag[i]=!flag[i];
}
document.layers["dot"+i].top
= yp[i] +
amy[i]*(Math.abs(Math.sin(dx[i])+dx[i]));
document.layers["dot"+i].left =
xp[i] + amx[i]*dx[i];
}
setTimeout("snowNS()", speed);
}
function snowIE() { // IE main animation function
for (i = 0; i <
no; ++ i) { // iterate for every dot
if (yp[i] > doc_height-50)
{
xp[i] = 10+ Math.random()*(doc_width-amx[i]-30);
yp[i] = 0;
stx[i] =
0.02 + Math.random()/10;
sty[i] = 0.7 +
Math.random();
flag[i]=(Math.random()<0.5)?1:0;
doc_width =
document.body.clientWidth;
doc_height =
document.body.clientHeight;
}
if (flag[i])
dx[i] +=
stx[i];
else
dx[i] -= stx[i];
if (Math.abs(dx[i]) > Math.PI)
{
yp[i]+=Math.abs(amy[i]*dx[i]);
xp[i]+=amx[i]*dx[i];
dx[i]=0;
flag[i]=!flag[i];
}
document.all["dot"+i].style.pixelTop = yp[i] +
amy[i]*(Math.abs(Math.sin(dx[i])+dx[i]));
document.all["dot"+i].style.pixelLeft
= xp[i] + amx[i]*dx[i];
}
setTimeout("snowIE()", speed);
}
if (ns4up) {
snowNS();
} else if (ie4up) {
snowIE();
}
// End
-->
</script>
<!-- Slut på sne script-->