//Configure below to change URL path to the snow image

var snowsrc="http://ecobiocentre.ru/images/snow.gif";

// Configure below to change number of snow to render
var currentTime = new Date();
var month = currentTime.getMonth() + 1;
var day = currentTime.getDate();
var year = currentTime.getFullYear();
//document.write("<h1 align='right'>"+month + "/" + day + "/" + year+"</h1>");
var no=0;

if ( month == 12 )
{
	if (day >=25)	
	{ 	 var no=25;

	}
}
if ( month == 1)
{
	if (day <=15)
	{ 	var no=25;

	}
}

// Configure whether snow should disappear after x seconds (0=never):

var hidesnowtime = 250;
// Configure how much snow should drop down before fading ("windowheight" or "pageheight")

var snowdistance = "pageheight";

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

var iecompattest = (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();
dots = new Array();

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() * 0.25; 
// set step variables
  sty[i] = 1.5 + Math.random();     
// set step variables
	if (ie4up||ns6up) {
    document.write("<img id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i+1000 +"; VISIBILITY: visible; TOP: -100px; LEFT: -100px;\" src='"+snowsrc+"' border=\"0\">");
  }
	dots[i] = document.getElementById("dot"+i);
}

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) {
    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() * 0.10;
      sty[i] = 0.7 + Math.random();
    }
    dx[i] += stx[i];
    dots[i].style.top = yp[i]+"px";
    dots[i].style.left = xp[i] + am[i]*Math.sin(dx[i])+"px";  
  }
  snowtimer=setTimeout("snowIE_NS6()", 50);
}

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)
}