//Configure below to change URL path to the snow image
// var picsrc="pic/leaf.gif"
var picsrc="pic/flake.gif"
// var picsrc="pic/flake2.gif"
// Configure below to change number of snow to render
var no = 10;

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 = 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;
	}

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\"><a href=\"http://dynamicdrive.com/\"><img src='"+picsrc+"' border=\"0\"></a></layer>");
		else
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src='"+picsrc+"' 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;\"><a href=\"http://dynamicdrive.com\"><img src='"+picsrc+"' 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='"+picsrc+"' 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()", 10);
	}

function snowIE() {	 // IE 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 = 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()", 10);
	}

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