var snowmax=30
var snowletter=new Array("<img src='../images/CNY_flower.gif'>","<img src='../images/CNY_love.gif'>","<img src='../images/CNY_love2.gif'>");
var sinkspeed=0.6
var snowmaxsize=45
var snowminsize=8
var snowingzone=1

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 browserok=true;

function randommaker(range) {		
	rand=Math.floor(range*Math.random())
    return rand
}

function initsnow() {

	marginbottom = document.documentElement.scrollHeight

	if (window.innerHeight) {
		marginright = window.innerWidth
	}
	else if (document.documentElement.clientHeight) {
		marginright = document.documentElement.clientWidth
	}

	marginright -= 10;

	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].size=randommaker(snowsizerange)+snowminsize
		snow[i].style.fontSize=snow[i].size
		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(6*marginbottom-marginbottom-6*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]) +"px";
		snow[i].style.top=snow[i].posy +"px";
		
		if (snow[i].posy>=marginbottom-6*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[randommaker(snowletter.length)]+"</span>")
}

/*if (browserok) {

	BrowserDetect.init();
	if (BrowserDetect.browser == "Firefox")  { 
		document.addEventListener("DOMContentLoaded", initsnow, false);
	} else { 
		window.onload=initsnow;
	}
}*/