var snowsrc="images/snowflake.gif"
var no = 10;
var snowdistance = "pageheight";

var ie4 = (document.all) ? 1 : 0;
var ns6 = (document.getElementById && !document.all) ? 1 : 0;

function IECompat()
{
	return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body
}

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

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

if (ns6)
{
	doc_width = self.innerWidth;
	doc_height = self.innerHeight;
}
else if (ie4)
{
	doc_width = IECompat().clientWidth;
	doc_height = IECompat().clientHeight;
}

function JSnowStep()
{
	doc_width = ns6 ? (window.innerWidth - 10) : (IECompat().clientWidth - 10);
	doc_height=(window.innerHeight && snowdistance == "windowheight") ? window.innerHeight : (ie4 && snowdistance == "windowheight") ? IECompat().clientHeight : (ie4 && !window.opera && snowdistance == "pageheight") ? IECompat().scrollHeight : IECompat().offsetHeight;
	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();
		}
		dx[i] += stx[i];
		document.getElementById("dot" + i).style.top = yp[i] + "px";
		document.getElementById("dot" + i).style.left = xp[i] + am[i]*Math.sin(dx[i]) + "px";  
	}
	snowtimer=setTimeout("JSnowStep()", 10);
}

function JSnowStart()
{
	if (ie4 || ns6)
	{
		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 (ie4 || ns6)
			{
				document.write("<div id=\"dot" + i + "\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\" class=\"snowflake\"><img src='" + snowsrc + "' border=\"0\"><\/div>");
			}
		}
		JSnowStep();
	}
}