Nieve cayendo en el blog

Quedan muy pocos días para Navidad y en el tutorial de hoy, veremos cómo agregar un efecto de copos de nieve que caen en nuestro blog.

( ↪ Ver DEMO)

1.§ Vamos a Diseño - Añadir un gadget y elegimos HTML/Javascript.

2.§ Pegaremos el siguiente script:

<script type='text/javascript'>
var fallObjects=new Array();function newObject(url,height,width){fallObjects[fallObjects.length]=new Array(url,height,width);}

var numObjs=20, waft=50, fallSpeed=10, wind=0;
newObject("http://2.bp.blogspot.com/--fII5xz-9vY/UM-djWHHwgI/AAAAAAAABrI/tEKS6_ctv_k/s400/nieve2_jessi_diyva.png",22,22);
newObject("http://3.bp.blogspot.com/-DPHwVIctTlg/UM-di9jKOiI/AAAAAAAABq8/wV567ynxL2U/s400/nieve1_jessi_diyva.png",22,22);

function winSize(){winWidth=(moz)?window.innerWidth-180:document.body.clientWidth-180;winHeight=(moz)?window.innerHeight+500:document.body.clientHeight+500;}
function winOfy(){winOffset=(moz)?window.pageYOffset:document.body.scrollTop;}
function fallObject(num,vari,nu){
objects[num]=new Array(parseInt(Math.random()*(winWidth-waft)),-30,(parseInt(Math.random()*waft))*((Math.random()>0.5)?1:-1),0.02+Math.random()/20,0,1+parseInt(Math.random()*fallSpeed),vari,fallObjects[vari][1],fallObjects[vari][2]);
if(nu==1){document.write('<img id="fO'+i+'" style="position:fixed;" src="'+fallObjects[vari][0]+'">'); }
}
function fall(){
for(i=0;i<numObjs;i++){
var fallingObject=document.getElementById('fO'+i);
if((objects[i][1]>(winHeight-(objects[i][5]+objects[i][7])))||(objects[i][0]>(winWidth-(objects[i][2]+objects[i][8])))){fallObject(i,objects[i][6],0);}
objects[i][0]+=wind;objects[i][1]+=objects[i][5];objects[i][4]+=objects[i][3];
with(fallingObject.style){ top=objects[i][1]+winOffset+'px';left=objects[i][0]+(objects[i][2]*Math.cos(objects[i][4]))+'px';}
}
setTimeout("fall()",31);
}
var objects=new Array(),winOffset=0,winHeight,winWidth,togvis,moz=(document.getElementById&&!document.all)?1:0;winSize();
for (i=0;i<numObjs;i++){fallObject(i,parseInt(Math.random()*fallObjects.length),1);}
fall();
</script>

3.§ Finalmente, damos click en Guardar.