Скрипт падающих снежинок

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Я нашел не плохой скрипт падающих снежинок, не использующий графики:

<script language="javascript">

var snowmax=45;

var snowcolor=new Array("#AAAACC","#DDDDFF","#CCCCDD","#F3F3F3","#F0FFFF");

var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS");

var snowletter="*";



// 0.3 to 2

var sinkspeed=0.6;

var snowmaxsize=40;

var snowminsize=10;



// the snowing-zone

// Set 1 for all-over-snowing, set 2 for left-side-snowing

// Set 3 for center-snowing, set 4 for right-side-snowing

var snowingzone=1;



//osw

var snow=new Array();

var marginbottom;

var marginright;

var timer;

var i_snow=0;

var x_mv=new Array();

var crds=new Array();

var lftrght=new Array();

var browserinfos=navigator.userAgent ;

var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/);

var ns6=document.getElementById&&!document.all;

var opera=browserinfos.match(/Opera/)  ;

var browserok=ie5||ns6||opera;



function randommaker(range) {		

	rand=Math.floor(range*Math.random());

    return rand;

}



function initsnow() {

	if (ie5 || opera) {

		marginbottom = document.body.clientHeight;

		marginright = document.body.clientWidth;

	}

	else if (ns6) {

		marginbottom = window.innerHeight;

		marginright = window.innerWidth;

	}

	var snowsizerange=snowmaxsize-snowminsize;

	for (i=0;i<=snowmax;i++) {

		crds = 0;

    	lftrght = Math.random()*15;

    	x_mv = 0.03 + Math.random()/10;

		snow=document.getElementById("s"+i);

		snow.style.fontFamily=snowtype[randommaker(snowtype.length)];

		snow.size=randommaker(snowsizerange)+snowminsize;

		snow.style.fontSize=snow.size;

		snow.style.color=snowcolor[randommaker(snowcolor.length)];

		snow.sink=sinkspeed*snow.size/5;

		if (snowingzone==1) {snow.posx=randommaker(marginright-snow.size);}

		if (snowingzone==2) {snow.posx=randommaker(marginright/2-snow.size);}

		if (snowingzone==3) {snow.posx=randommaker(marginright/2-snow.size)+marginright/4;}

		if (snowingzone==4) {snow.posx=randommaker(marginright/2-snow.size)+marginright/2;}

		snow.posy=randommaker(2*marginbottom-marginbottom-2*snow.size);

		snow.style.left=snow.posx;

		snow.style.top=snow.posy;

	}

	movesnow();

}



function movesnow() {

	for (i=0;i<=snowmax;i++) {

		crds += x_mv;

		snow.posy+=snow.sink;

		snow.style.left=snow.posx+lftrght*Math.sin(crds);

		snow.style.top=snow.posy;

		

		if (snow.posy>=marginbottom-2*snow.size || parseInt(snow.style.left)>(marginright-3*lftrght)){

			if (snowingzone==1) {snow.posx=randommaker(marginright-snow.size);}

			if (snowingzone==2) {snow.posx=randommaker(marginright/2-snow.size);}

			if (snowingzone==3) {snow.posx=randommaker(marginright/2-snow.size)+marginright/4;}

			if (snowingzone==4) {snow.posx=randommaker(marginright/2-snow.size)+marginright/2;}

			snow.posy=0;

		}

	}

	var timer=setTimeout("movesnow()",50);

}



for (i=0;i<=snowmax;i++) {

	document.write("<span id='s"+i+"' style='position:absolute;top:-"+snowmaxsize+"'>"+snowletter+"</span>");

}

if (browserok) {

	window.onload=initsnow;

}

</script>

Спасибо.