var speed = 100; // скорость снежинок

var snowflake = Array();

	snowflake[1]="http://exiterra.ru/promo/snow/s1.png";
	snowflake[2]="http://exiterra.ru/promo/snow/s2.png";
	snowflake[3]="http://exiterra.ru/promo/snow/s3.png";
	snowflake[4]="http://exiterra.ru/promo/snow/s5.png";
	snowflake[5]="http://exiterra.ru/promo/snow/s6.png";
	snowflake[6]="http://exiterra.ru/promo/snow/s7.png";
	snowflake[7]="http://exiterra.ru/promo/snow/s8.png";

var sneg = snowflake.length-1;

var ns4up = 0;
var ie4up = 0;
var ff = 0;

if (document.layers) {ns4up = 1}
else if (document.all) {ie4up = 1}
else {ff = 1}

var dx, xp, yp; 
var am, stx, sty; 
var i, doc_width = 800, doc_height = 600;

if (ns4up) {
	doc_width = self.innerWidth;
	doc_height = self.innerHeight;
}
else if (ie4up) {
	doc_width = document.body.clientWidth;
	doc_height = document.body.clientHeight;
}
else if (ff) {
	doc_width = window.innerWidth;
	doc_height = window.innerHeight;
}

if (ie4up && (doc_height < 300)) {doc_height = 300;}

dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();

for (i = 0; i < no; ++ i) {  
	dx[i] = 0;         
	xp[i] = Math.random()*(doc_width-50); 
	yp[i] = Math.random()*doc_height;
	am[i] = Math.random()*20;         
	stx[i] = 0.02 + Math.random()/10; 
	sty[i] = 0.7 + Math.random();   
	
	if (ns4up) {                  
		if (i == 0) {
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
			document.write("top=\"15\" visibility=\"show\"><img class=tpl src=\"");
			//document.write(snowflake + "\" border=\"0\"></layer>");
			document.write(snowflake[Math.ceil(Math.random()*10*sneg/10)] + "\" border=\"0\"></layer>");
		}
		else {
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" ");
			document.write("top=\"15\" visibility=\"show\"><img class=tpl src=\"");
			//document.write(snowflake + "\" border=\"0\"></layer>");
			document.write(snowflake[Math.ceil(Math.random()*10*sneg/10)] + "\" border=\"0\"></layer>");
		}
	}
	else if (ie4up) {
		if (i == 0) {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ 10+i +"; display: ");
			document.write("block; TOP: 15px; LEFT: 15px;\"><img class=tpl src=\"");
			//document.write(snowflake + "\" border=\"0\"></div>");
			document.write(snowflake[Math.ceil(Math.random()*10*sneg/10)] + "\" border=\"0\"></div>");
		}
		else {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ 10+i +"; display: ");
			document.write("block; TOP: 15px; LEFT: 15px;\"><img class=tpl src=\"");
			//document.write(snowflake + "\" border=\"0\"></div>");
			document.write(snowflake[Math.ceil(Math.random()*10*sneg/10)] + "\" border=\"0\"></div>");
		}
	}
	else if (ff) {
		if (i == 0) {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ 10+i +"; display: ");
			document.write("block; TOP: 15px; LEFT: 15px;\"><img class=tpl src=\"");
			//document.write(snowflake + "\" border=\"0\"></div>");
			document.write(snowflake[Math.ceil(Math.random()*10*sneg/10)] + "\" border=\"0\"></div>");
		}
		else {
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
			document.write("absolute; Z-INDEX: "+ 10+i +"; display: ");
			document.write("block; TOP: 15px; LEFT: 15px;\"><img class=tpl src=\"");
			//document.write(snowflake + "\" border=\"0\"></div>");
			document.write(snowflake[Math.ceil(Math.random()*10*sneg/10)] + "\" border=\"0\"></div>");
		}
	}
}

function snowNS() { 
	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()/10;
			sty[i] = 0.7 + Math.random();
			doc_width = self.innerWidth;
			doc_height = self.innerHeight;
		}
		dx[i] += stx[i];
		document.layers["dot"+i].top = yp[i];
		document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
	}
	setTimeout("snowNS()", speed);
}

function snowIE() {
	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()/10;
			sty[i] = 0.7 + Math.random();
			doc_width = document.body.clientWidth;
			doc_height = document.body.clientHeight;
			if (doc_height < 300) {doc_height = 300;}
		}
		dx[i] += stx[i];
		document.all["dot"+i].style.pixelTop = yp[i];
		document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
	}
	setTimeout("snowIE()", speed);
}

function snowFF() { 
	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()/10;
			sty[i] = 0.7 + Math.random();
			doc_width = self.innerWidth;
			doc_height = self.innerHeight;
		}
		dx[i] += stx[i];
		string_top = yp[i]+"px";
		string_left = xp[i] + am[i]*Math.sin(dx[i])+"px";
		document.getElementById("dot"+i).style.top = string_top;
		document.getElementById("dot"+i).style.left = string_left;
	}
	setTimeout("snowFF()", speed);
}

if (ns4up) {
	snowNS();
}
else if (ie4up) {
	snowIE();
}
else if (ff) {
	snowFF();
}