navidad.js

<script>if  ((document.getElementById) &&

window.addEventListener || window.attachEvent){



(function(){



//Configure here.



var num = 30;   //Number of flakes

var timer = 30; //setTimeout speed. Varies on different comps

var enableinNS6 = 1 //Enable script in NS6/Mozilla? Snow animation could be slow in those browsers. (1=yes, 0=no).



//End.



var y = [];

var x = [];

var fall = [];

var theFlakes = [];

var sfs = [];

var step = [];

var currStep = [];

var h,w,r;

var d = document;

var pix = "px";

var domWw = (typeof window.innerWidth == "number");

var domSy = (typeof window.pageYOffset == "number");

var idx = d.getElementsByTagName('div').length;



if (d.documentElement.style &&

typeof d.documentElement.style.MozOpacity == "string")

num = 12;



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

sfs[i] = Math.round(1 + Math.random() * 1);



document.write('<div id="flake'+(idx+i)+'" style="position:absolute;top:0px;left:0px;width:'

+sfs[i]+'px;height:'+sfs[i]+'px;background-color:#ffffff;font-size:'+sfs[i]+'px"><\/div>');



currStep[i] = 0;

fall[i] = (sfs[i] == 1)?

Math.round(2 + Math.random() * 2): Math.round(3 + Math.random() * 2);

step[i] = (sfs[i] == 1)?

0.05 + Math.random() * 0.1 : 0.05 + Math.random() * 0.05 ;

}





if (domWw) r = window;

else{

  if (d.documentElement &&

  typeof d.documentElement.clientWidth == "number" &&

  d.documentElement.clientWidth != 0)

  r = d.documentElement;

else{

  if (d.body &&

  typeof d.body.clientWidth == "number")

  r = d.body;

}

}





function winsize(){

var oh,sy,ow,sx,rh,rw;

if (domWw){

  if (d.documentElement && d.defaultView &&

  typeof d.defaultView.scrollMaxY == "number"){

  oh = d.documentElement.offsetHeight;

  sy = d.defaultView.scrollMaxY;

  ow = d.documentElement.offsetWidth;

  sx = d.defaultView.scrollMaxX;

  rh = oh-sy;

  rw = ow-sx;

}

else{

  rh = r.innerHeight;

  rw = r.innerWidth;

}

h = rh - 2;

w = rw - 2;

}

else{

h = r.clientHeight - 2;

w = r.clientWidth - 2;

}

}





function scrl(yx){

var y,x;

if (domSy){

y = r.pageYOffset;

x = r.pageXOffset;

}

else{

y = r.scrollTop;

x = r.scrollLeft;

}

return (yx == 0)?y:x;

}





function snow(){

var dy,dx;



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

dy = fall[i];

dx = fall[i] * Math.cos(currStep[i]);



y[i]+=dy;

x[i]+=dx;



if (x[i] >= w || y[i] >= h){

  y[i] = -10;

  x[i] = Math.round(Math.random() * w);

  fall[i] = (sfs[i] == 1)?

  Math.round(2 + Math.random() * 2): Math.round(3 + Math.random() * 2);

  step[i] = (sfs[i] == 1)?

  0.05 + Math.random() * 0.1 : 0.05 + Math.random() * 0.05 ;

}



theFlakes[i].top = y[i] + scrl(0) + pix;

theFlakes[i].left = x[i] + scrl(1) + pix;



currStep[i]+=step[i];

}

setTimeout(snow,timer);

}





function init(){

winsize();

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

theFlakes[i] = document.getElementById("flake"+(idx+i)).style;

y[i] = Math.round(Math.random()*h);

x[i] = Math.round(Math.random()*w);

}

snow();

}





if (window.addEventListener){

window.addEventListener("resize",winsize,false);

window.addEventListener("load",init,false);

}

else if (window.attachEvent){

window.attachEvent("onresize",winsize);

window.attachEvent("onload",init);

}



})();

}//End.</scrip>