var snowsrc="archiv/weihnachten/images/schneeflocke_1.gif"	// Verweis zur Grafik
var no = 20;												// Anzahl Schneeflocken
var speed = 10;									// smaller number moves the snow faster
var ns4up = (document.layers) ? 1 : 0;			// browser sniffer
var ie4up = (document.all) ? 1 : 0;
var dx, xp, yp;									// coordinate and position variables
var am, stx, sty;								// amplitude and step variables
var i, doc_width = 1024, doc_height = 768;
if (ns4up)
	{
	doc_width = self.innerWidth;
	doc_height = self.innerHeight;
	}
else if (ie4up)
	{
	doc_width = screen.width;
	doc_height = screen.height;
	}

 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;									// 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 (ns4up)									// set layers
		{
		if (i == 0)
			{
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><<img src='"+snowsrc+"' border=\"0\"></layer>");
			}
		else
			{
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src='"+snowsrc+"' border=\"0\"></layer>");
			}
		}
	else if (ie4up)
		{
		if (i == 0)
			{
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"></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 snowNS()							// Netscape main animation function
	{
	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();
			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;
			}
		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);
	}

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