var no = 20; // snow number
var speed = 50; // smaller number moves the snow faster
var snowflake= "images/star.gif";
var dx, xp, yp;    // coordinate and position variables
var am, stx, sty;  // amplitude and step variables
var i, doc_width = 800, doc_height = 600;

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 (i == 0) {
		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>");
	} else {
		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>");
	}
}

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()", speed);
}

snowIE();