<script>

// Numero de copos, recomendados entre 30 y 40
var nieve_cantidad=35

// Colores de los copos se mostraran de forma aleatoria
var nieve_colorr=new Array("#aaaacc","#ddddFF","#ccccDD")

// Tipo de letra de los copos
var nieve_tipo=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")

// Valor o letra de los copos
var nieve_letra="*"

// velocidad de caida
var nieve_velocidad=0.6

// tamaño mas grande de los copos
var nieve_cantidadsize=30

// tamaño mas pequeño de los copos
var nieve_chico=8

// 1 toda la pagina - 2 zona izquierda - 3 centro de pagina - 4 zona derecha
var nieve_zona=1

var nieve=new Array()
var marginbottom
var marginright
var timer
var i_nieve=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 aleatorio(range) {
rand=Math.floor(range*Math.random())
return rand
}

function initnieve() {
if (ie5 || opera) {
marginbottom = document.body.clientHeight
marginright = document.body.clientWidth
}
else if (ns6) {
marginbottom = window.innerHeight
marginright = window.innerWidth
}
var nievesizerange=nieve_cantidadsize-nieve_chico
for (i=0;i<=nieve_cantidad;i++) {
crds[i] = 0;
lftrght[i] = Math.random()*15;
x_mv[i] = 0.03 + Math.random()/10;
nieve[i]=document.getElementById("s"+i)
nieve[i].style.fontFamily=nieve_tipo[aleatorio(nieve_tipo.length)]
nieve[i].size=aleatorio(nievesizerange)+nieve_chico
nieve[i].style.fontSize=nieve[i].size
nieve[i].style.color=nieve_colorr[aleatorio(nieve_colorr.length)]
nieve[i].sink=nieve_velocidad*nieve[i].size/5
if (nieve_zona==1) {nieve[i].posx=aleatorio(marginright-nieve[i].size)}
if (nieve_zona==2) {nieve[i].posx=aleatorio(marginright/2-nieve[i].size)}
if (nieve_zona==3) {nieve[i].posx=aleatorio(marginright/2-nieve[i].size)+marginright/4}
if (nieve_zona==4) {nieve[i].posx=aleatorio(marginright/2-nieve[i].size)+marginright/2}
nieve[i].posy=aleatorio(2*marginbottom-marginbottom-2*nieve[i].size)
nieve[i].style.left=nieve[i].posx
nieve[i].style.top=nieve[i].posy
}
movenieve()
}

function movenieve() {
for (i=0;i<nieve_cantidad>=marginbottom-2*nieve[i].size || parseInt(nieve[i].style.left)>(marginright-3*lftrght[i])){
if (nieve_zona==1) {nieve[i].posx=aleatorio(marginright-nieve[i].size)}
if (nieve_zona==2) {nieve[i].posx=aleatorio(marginright/2-nieve[i].size)}
if (nieve_zona==3) {nieve[i].posx=aleatorio(marginright/2-nieve[i].size)+marginright/4}
if (nieve_zona==4) {nieve[i].posx=aleatorio(marginright/2-nieve[i].size)+marginright/2}
nieve[i].posy=0
}
}
var timer=setTimeout("movenieve()",50)
}

for (i=0;i<=nieve_cantidad;i++) {
document.write("<span>"+nieve_letra+"</span>")
}
if (browserok) {
window.onload=initnieve
}
</script>

<script type="text/javascript">


  //Configure below to change URL path to the snow image
  var snowsrc="http://www.odiseapsp.es/foro/images/xmas/snfl_01.gif"
  // Configure below to change number of snow to render
  var no = 10;
  // Configure whether snow should disappear after x seconds (0=never):
  var hidesnowtime = 0;
  // Configure how much snow should drop down before fading ("windowheight" or "pageheight")
  var snowdistance = "pageheight";

///////////Stop Config//////////////////////////////////

  var ie4up = (document.all) ? 1 : 0;
  var ns6up = (document.getElementById&&!document.all) ? 1 : 0;

   function iecompattest(){
   return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
   }

  var dx, xp, yp;    // coordinate and position variables
  var am, stx, sty;  // amplitude and step variables
  var i, doc_width = 800, doc_height = 600;

  if (ns6up) {
    doc_width = self.innerWidth;
    doc_height = self.innerHeight;
  } else if (ie4up) {
    doc_width = iecompattest().clientWidth;
    doc_height = iecompattest().clientHeight;
  }

  dx = new Array();
  xp = new Array();
  yp = new Array();
  am = new Array();
  stx = new Array();
  sty = new Array();
  snowsrc=(snowsrc.indexOf("dynamicdrive.com")!=-1)? "snow.gif" : snowsrc
  for (i = 0; i < no; ++ i) {
    dx[i] = 0;                        // set coordinate variables
    xp[i] = Math.random()*(doc_width-50);  // set position variables
    yp[i] = Math.random()*doc_height;
    am[i] = Math.random()*20;         // set amplitude variables
    stx[i] = 0.02 + Math.random()/10; // set step variables
    sty[i] = 0.7 + Math.random();     // set step variables
      if (ie4up||ns6up) {
      if (i == 0) {
        document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://dynamicdrive.com\"><img src='"+snowsrc+"' border=\"0\"><\/a><\/div>");
      } else {
        document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"><\/div>");
      }
    }
  }

  function snowIE_NS6() {  // IE and NS6 main animation function
    doc_width = ns6up?window.innerWidth-10 : iecompattest().clientWidth-10;
      doc_height=(window.innerHeight && snowdistance=="windowheight")? window.innerHeight : (ie4up && snowdistance=="windowheight")?  iecompattest().clientHeight : (ie4up && !window.opera && snowdistance=="pageheight")? iecompattest().scrollHeight : iecompattest().offsetHeight;
    for (i = 0; i < no; ++ i) {  // iterate for every dot
      yp[i] += sty[i];
      if (yp[i] > doc_height-50) {
        xp[i] = Math.random()*(doc_width-am[i]-30);
        yp[i] = 0;
        stx[i] = 0.02 + Math.random()/10;
        sty[i] = 0.7 + Math.random();
      }
      dx[i] += stx[i];
      document.getElementById("dot"+i).style.top=yp[i]+"px";
      document.getElementById("dot"+i).style.left=xp[i] + am[i]*Math.sin(dx[i])+"px";
    }
    snowtimer=setTimeout("snowIE_NS6()", 10);
  }

   function hidesnow(){
      if (window.snowtimer) clearTimeout(snowtimer)
      for (i=0; i<no; i++) document.getElementById("dot"+i).style.visibility="hidden"
   }
       

if (ie4up||ns6up){
    snowIE_NS6();
      if (hidesnowtime>0)
      setTimeout("hidesnow()", hidesnowtime*1000)
      }

</script>