var no = 25; // antal snöflingor
var speed = 50; // snöar fortare vid ett lägre värde 
var snowflake = "bilder/flinga.gif";

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 = 100;

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();
dotLayer = 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

	document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
	document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
	document.write("visible; TOP: 15px; LEFT: 15px;\"><img src=\"");
	document.write(snowflake + "\" border=\"0\"></div>");
	dotLayer[i] = document.getElementById("dot"+i);
}
function snow() { // IE main animation function
	for (i = 0; i < no; ++ i) { // iterate for every dot
		yp[i] += sty[i];
		if (yp[i] > doc_height-20) {
			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];
		dotLayer[i].style.top = yp[i];
		dotLayer[i].style.left = xp[i] + am[i]*Math.sin(dx[i]);
	}
	setTimeout("snow()", speed);
}
snow();