Snow

<script language="JavaScript">
var snowsrc="Bild-Link-Flocke"
var no = 10; // Anzahl der Flocken not more than 40
var speed = 10; // smaller number moves the snow faster
var ns4 = (document.layers) ? 1 : 0;
var ie = (document.all ) ? 1 : 0;
var dom = (document.getElementById && !document.all) ? 1 : 0;

var dx, xp, yp;
var am, stx, sty;
var i;
var doc_width = screen.availWidth;
var doc_height = screen.availHeight;


if (ns4)
{ doc_width = self.innerWidth;
doc_height = self.innerHeight; }
else if (ie)
{ doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight; }
else if (dom)
{ 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 (ns4)
{
if (i == 0)
{ document.write("<layer name='dot"+ i +"' left='-20' top='-20' visibility='show'><img src='"+snowsrc+"' border='0'></layer>"); }
else
{ document.write("<layer name='dot"+ i +"' left='-20' top='-20' visibility='show'><img src='"+snowsrc+"' border='0'></layer>"); }
}
else if (ie)
{
if (i == 0)
{ document.write("<div id='dot"+ i +"' style='position:absolute; z-index:"+ i +"; visibility:visible; top:-20px; left:-20px;'><img src='"+snowsrc+"' border='0'></div>"); }
else
{ document.write("<div id='dot"+ i +"' style='position:absolute; z-index:"+ i +"; visibility:visible; top:-20px; left:-20px;'><img src='"+snowsrc+"' border='0'></div>"); }
}
else if (dom)
{
if (i == 0)
{ document.write("<div id='dot"+ i +"' style='position:absolute; z-index:"+ i +"; visibility:visible; top:-20px; left:-20px;'><img src='"+snowsrc+"' border='0'></div>"); }
else
{ document.write("<div id='dot"+ i +"' style='position:absolute; z-index:"+ i +"; visibility:visible; top:-20px; left:-20px;'><img src='"+snowsrc+"' border='0'></div>"); }
}
}

function snowNS4() {
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("snowNS4()", 10);
}

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()", 10);
}

function snowDOM() {
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.getElementById("dot"+i).style.top = yp[i];
document.getElementById("dot"+i).style.left = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowDOM()", 10);
}

if (ns4)
{ snowNS4(); }
else if (ie)
{ snowIE(); }
else if (dom)
{ snowDOM(); }

</script>