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Snow Java Script


Brad
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A decent Javascript for snow flakes on a page! Try it out!

<hr />

<script>
var snowmax=40
var snowcolor=new Array("#aaaacc","#ddddFF","#ccccDD")
var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")
var snowletter="*"
var sinkspeed=4
var snowmaxsize=32
var snowminsize=22
var snowingzone=3

// Luke Don't edit below this line
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[i] = 0;                      
    	lftrght[i] = Math.random()*15;         
    	x_mv[i] = 0.03 + Math.random()/10;
	snow[i]=document.getElementById("s"+i)
	snow[i].style.fontFamily=snowtype[randommaker(snowtype.length)]
	snow[i].size=randommaker(snowsizerange)+snowminsize
	snow[i].style.fontSize=snow[i].size
	snow[i].style.color=snowcolor[randommaker(snowcolor.length)]
	snow[i].sink=sinkspeed*snow[i].size/5
	if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}
	if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}
	if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}
	if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}
	snow[i].posy=randommaker(2*marginbottom-marginbottom-2*snow[i].size)
	snow[i].style.left=snow[i].posx
	snow[i].style.top=snow[i].posy
}
movesnow()
}

function movesnow() {
for (i=0;i<=snowmax;i++) {
	crds[i] += x_mv[i];
	snow[i].posy+=snow[i].sink
	snow[i].style.left=snow[i].posx+lftrght[i]*Math.sin(crds[i]);
	snow[i].style.top=snow[i].posy

	if (snow[i].posy>=marginbottom-2*snow[i].size || parseInt(snow[i].style.left)>(marginright-3*lftrght[i])){
		if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}
		if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}
		if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}
		if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}
		snow[i].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>

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  • 3 years later...
  • Administrators

Beautiful! Thanks for the share, I'm sure this will come handy in one of my projects.

However I noticed that (on Google Chrome at least), the scroll bar flickers about every 0.2 seconds. A little glitch I'm sure we can fix. I'll post a fix if i'm able to find one :-)

Yeah let me know if you do, I'd like to use it.

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