var snowflakes=50;     //Het aantal sneeuwvlokjes.
var level=2;   //Snelheids Level 1 tot 5     1=Trager en 5=Snelst
var w3c=(document.getElementById)?true:false;
var ns4=(document.layers)?true:false;
var ie4=(document.all && !w3c)?true:false;
var ie5=(document.all && w3c)?true:false;
var ns6=(w3c && navigator.appName.indexOf("Netscape")>=0)?true:false;
var t='';
var w_x, w_y;
var snow=new Array();

for(i=1;i<=snowflakes;i++)t+='<div id="snow'+i+'" class="snow"></div>';
	document.write(t);
	
function getstartpos(obj){
	obj.size=Math.floor(Math.random()*3)+1
	obj.ystep=obj.size*level;
	obj.xstep=obj.ystep/5;
	if(ns4)obj.clip.width=obj.clip.height=obj.size;
	else obj.style.width=obj.style.height=obj.size;
	moveidto(obj,Math.floor(Math.random()*w_x)-obj.size,0);
}

function movedrop(){
for(i=1;i<=snowflakes;i++){
	var l=(ns4)?snow[i].left:parseInt(snow[i].style.left);
	var t=(ns4)?snow[i].top:parseInt(snow[i].style.top);
	var pxo=(ie4||ie5)?document.body.scrollLeft:pageXOffset;
	var pyo=(ie4||ie5)?document.body.scrollTop:pageYOffset;
	if( (t+snow[i].ystep+snow[i].size>=w_y+pyo) || (snow[i].xpos-snow[i].size<pxo)) getstartpos(snow[i]);
	else moveidto(snow[i], l-snow[i].xstep, t+snow[i].ystep);
	}
}

function getwindowdims(){
	w_x=(ie4||ie5)? document.body.clientWidth:window.innerWidth;
	w_y=(ie4||ie5)? document.body.clientHeight:window.innerHeight;
}

function moveidto(id,x,y){
	if(ns4)id.moveTo(x,y);
	else{
		id.style.left=x+'px';
		id.style.top=y+'px';
	}
}

function window_onresize() {
	if(ns4)setTimeout('history.go(0)',400);
	else getwindowdims();
}

function window_onload() {
	level=Math.max(Math.min(5,level),1);
	getwindowdims();
	for(i=1;i<=snowflakes;i++){
		snow[i]=(ns4)?document.layers['snow'+i]:(ie4)?document.all['snow'+i]:document.getElementById('snow'+i);
		getstartpos(snow[i]);
		moveidto(snow[i],Math.floor(Math.random()*(w_x-10)),Math.floor(Math.random()*(w_y-10)));
	}
	setInterval('movedrop()',50);
}