////////////////////////////////////////////////////////////////
// Javascript made by Rasmus Petersen - http://www.peters1.dk //
////////////////////////////////////////////////////////////////

var SNOW_Picture = "index-Dateien/Schnee/snow.gif";

var SNOW_browser_IE_NS = (document.body.clientHeight) ? 1 : 0;
var SNOW_browser_MOZ = (self.innerWidth) ? 1 : 0;

if (SNOW_browser_IE_NS) {
  var SNOW_no = document.body.clientWidth / 50;
} else if (SNOW_browser_MOZ) {
  var SNOW_no = (self.innerWidth - 20) / 50;
}

var SNOW_Time;
var SNOW_dx, SNOW_xp, SNOW_yp;
var SNOW_am, SNOW_stx, SNOW_sty;
var i, SNOW_Browser_Width, SNOW_Browser_Height;

var datum = new Date();
if (datum.getMonth()==11 && datum.getDate()>=23 && datum.getDate()<=27)
  var do_snow = true;
else
  var do_snow = false;

if (SNOW_browser_IE_NS)
{
  SNOW_Browser_Width = document.body.clientWidth;
  SNOW_Browser_Height = document.body.clientHeight;
}
else if (SNOW_browser_MOZ)
{
  SNOW_Browser_Width = self.innerWidth - 20;
  SNOW_Browser_Height = self.innerHeight;
}

SNOW_dx = new Array();
SNOW_xp = new Array();
SNOW_yp = new Array();
SNOW_am = new Array();
SNOW_stx = new Array();
SNOW_sty = new Array();

for (i = 0; i < SNOW_no; ++ i)
{
  SNOW_dx[i] = 0;
  SNOW_xp[i] = Math.random()*(SNOW_Browser_Width-50);
  SNOW_yp[i] = Math.random()*SNOW_Browser_Height;
  SNOW_am[i] = Math.random()*20;
  SNOW_stx[i] = 0.02 + Math.random()/10;
  SNOW_sty[i] = 0.7 + Math.random();
  if (do_snow)
    document.write("<\div id=\"SNOW_flake"+ i +"\" style=\"position: absolute; z-index: "+ i +"; visibility: visible; top: 15px; left: 15px;\"><\img src=\""+SNOW_Picture+"\" border=\"0\"><\/div>");
}

function SNOW_Weather()
{

  if(do_snow){
    for (i = 0; i < SNOW_no; ++ i)
    {
      SNOW_yp[i] += SNOW_sty[i];

      if (SNOW_yp[i] > SNOW_Browser_Height-50)
      {
        SNOW_xp[i] = Math.random()*(SNOW_Browser_Width-SNOW_am[i]-30);
        SNOW_yp[i] = 0;
        SNOW_stx[i] = 0.02 + Math.random()/10;
        SNOW_sty[i] = 0.7 + Math.random();
      }

      SNOW_dx[i] += SNOW_stx[i];

      document.getElementById("SNOW_flake"+i).style.top=SNOW_yp[i]+"px";
      document.getElementById("SNOW_flake"+i).style.left=SNOW_xp[i] + SNOW_am[i]*Math.sin(SNOW_dx[i])+"px";
    }

    SNOW_Time = setTimeout("SNOW_Weather()", 10);

  }
}
SNOW_Weather();