I found a script at Dreamhost to make it snow on the page. Let’s see if it works.

<SCRIPT language=”JavaScript1.2″>
<!–//
//Original script by Altan (Snow@altan.hr), copyright 1999 Altan d.o.o.
// http://www.altan.hr/snow/index.html
// Modified by Paul Anderson, copyright 2001 CNET Builder.com
var snowflake = “http://www.dreamhost.com/images/snow.gif”;
var no = 75; // number of snowflakes on the screen
var speed = 5; // smaller numbers make the snow fall faster
var dx, xp, yp; // coordinate and position variables
var am, stx, sty; // amplitude and step variables
var obj, i, doc_width = 800, doc_height = 600;
function winSize() {
doc_width = window.innerWidth?window.innerWidth:document.body.clientWidth;
doc_height = window.innerHeight?window.innerHeight:document.body.clientHeight;
}
dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
winSize();
document.write(“<STYLE type=”text/css”>.flake {position:absolute;top:-200;}</STYLE>”);
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;
am[i] = Math.random()*20; // set amplitude variables
stx[i] = 0.02 + Math.random()/10; // set step variables
sty[i] = 0.7 + Math.random(); // set step variables
document.write(“<div id=”dot”+ i +”” class=”flake”><img src=””);
document.write(snowflake + “” border=”0″></div>”);
}
function snowMove(id,left,top) {
obj = document.getElementById?document.getElementById(id).style:
document.all?document.all[id].style:
document.layers?document.layers[id]:null;
if (obj) {
obj.left=left;
obj.top=top;
}
}
function snow() {
winSize();
doc_scroll = (window.pageYOffset!=null)?window.pageYOffset:document.body.scrollTop;
for (i = 0; i < no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] > doc_height+doc_scroll-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = doc_scroll;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
}
dx[i] += stx[i];
snowMove(“dot”+i,xp[i]+am[i]*Math.sin(dx[i]),yp[i]);
}
setTimeout(“snow()”, speed);
}
window.onload=snow;
//–>
</script>