//Configure below to change URL path to the snow image
var snowsrc="/assets/js/snow.png"
// Configure below to change number of snow to render
var no = 15;
// Configure whether snow should disappear after x seconds (0=never):
var hidesnowtime = 0;
// Configure how much snow should drop down before fading ("windowheight" or "pageheight")
var snowdistance = "pageheight";

///////////Stop Config//////////////////////////////////

var ie4up = (document.all) ? 1 : 0;
var ns6up = (document.getElementById&&!document.all) ? 1 : 0;

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

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(ns6up) {
	doc_width = self.innerWidth;
	doc_height = self.innerHeight;
} else if (ie4up) {
	doc_width = iecompattest().clientWidth;
	doc_height = iecompattest().clientHeight;
}

dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
snows=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(ie4up||ns6up)
		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 snowIE_NS6() {  // IE and NS6 main animation function
	doc_width = ns6up?window.innerWidth-10 : iecompattest().clientWidth-10;
	doc_height = 480;
	//doc_height=(window.innerHeight && snowdistance=="windowheight")? window.innerHeight : (ie4up && snowdistance=="windowheight")?  iecompattest().clientHeight : (ie4up && !window.opera && snowdistance=="pageheight")? iecompattest().scrollHeight : iecompattest().offsetHeight;
	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();
		}
		dx[i] += stx[i];
		if(snows[i]==null)
			snows[i]=document.getElementById("dot"+i);
		snows[i].style.top=yp[i]+"px";
		snows[i].style.left=xp[i] + am[i]*Math.sin(dx[i])+"px";
	}
	snowtimer=setTimeout("snowIE_NS6()", 10);
}

function hidesnow(){
	if(window.snowtimer) clearTimeout(snowtimer)
	for(i=0; i<no; i++) snows[i].style.visibility="hidden"
}

if (ie4up||ns6up){
	snowIE_NS6();
	if(hidesnowtime>0) setTimeout("hidesnow()", hidesnowtime*1000)
}