/**
 * Cross Browser Firework script by http://www.JavaScript-fx.com
 * You may use this script on any page as long as this comment
 * is not removed from the script.
 */
var ns4 = document.layers;
var ie4 = document.all;
if(!window.JSFX) JSFX=new Object();
JSFX.makeLayer = function(id)
{
	var el = 	document.getElementById	? document.getElementById(id) :
			document.all 		? document.all[id] :
							  document.layers[id];

	el.sPos = function(x,y){this.style.left = x;this.style.top=y;}
	el.sClr= function(color) { this.style.backgroundColor = color; } 
	el.sClp = function(x1,y1, x2,y2){ this.style.clip="rect("+y1+" "+x2+" "+y2+" "+x1+")"; }

	if(ns4)
	{
		el.style=el;
		el.sClp = function(x1,y1, x2,y2)
		{
			this.style.clip.top	=y1;
			this.style.clip.left	=x1;
			this.style.clip.bottom	=y2;
			this.style.clip.right	=x2;
		}
		el.sClr=function(color) { this.bgColor = color; }
	}
	if(window.opera)
		el.sClr = function(color) { this.style.color = color==null?'transparent':color; }

	return el;
}

if(window.innerWidth)
{
	gX=function(){return innerWidth;};
	gY=function(){return innerHeight;};
}
else
{
	gX=function(){return document.body.clientWidth;};
	gY=function(){return document.body.clientHeight;};
}

var hexDigit=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F");
function dec2hex(dec)
{
	return(hexDigit[dec>>4]+hexDigit[dec&15]);
}
function hex2dec(hex)
{
	return(parseInt(hex,16))
}

/*** Class FireworkSpark extends Object ***/
JSFX.FireworkSpark = function(x, y)
{
	this.id	= JSFX.FireworkSpark.getId();
	this.dx 	= Math.random() * 4 - 2;
	this.dy	= Math.random() * 4 - 2;
	this.ay	= .09;
	this.x	= x;
	this.y	= y;
	this.type = 0;

	document.write(ns4 ? "<LAYER  NAME='"+this.id+"'>*</LAYER>" : 
				   "<DIV id='"+this.id+"' style='position:absolute'>*</DIV>" );
	this.theLayer = JSFX.makeLayer(this.id);
}
JSFX.FireworkSpark.idNo=0;
JSFX.FireworkSpark.getId = function()
{
	return "fws" + JSFX.FireworkSpark.idNo++;
}
/*** END Class FireworkSpark Constructor - start methods ***/
JSFX.FireworkSpark.prototype.moveTo = function(x,y)
{
	this.theLayer.sPos(x, y);
}
JSFX.FireworkSpark.prototype.setBgColor = function(c)
{
	this.theLayer.sClr(c);
}
JSFX.FireworkSpark.prototype.clip = function(x1, y1, x2, y2)
{
	this.theLayer.sClp(x1, y1, x2, y2);
}
JSFX.FireworkSpark.prototype.fire0 = function()
{
	var a = Math.random() * 6.294;
	var s = Math.random() * 2;
	if(Math.random() >.6) s = 2;
	this.dx = s*Math.sin(a);
	this.dy = s*Math.cos(a) - 2;
}
JSFX.FireworkSpark.prototype.fire1 = function()
{
	var a = Math.random() * 6.294;
	var s = Math.random() * 2;
	this.dx = s*Math.sin(a);
	this.dy = s*Math.cos(a) - 2;
}
JSFX.FireworkSpark.prototype.fire2 = function()
{
	var a = Math.random() * 6.294;
	var s = 2;
	this.dx = s*Math.sin(a);
	this.dy = s*Math.cos(a) - 2;
}
JSFX.FireworkSpark.prototype.fire3 = function()
{
//	this.dx = Math.random()*2 - 1;
//	this.dy = - 2 - Math.random()*4;
	var a = Math.random() * 6.294;
	var s = a - Math.random();
	this.dx = s*Math.sin(a);
	this.dy = s*Math.cos(a) - 2;
}
JSFX.FireworkSpark.prototype.fire4 = function()
{
	var a = Math.random() * 6.294;
	var s = (Math.random() > 0.5) ? 2 : 1;
	if(s == 1)
		this.setFwColor = this.setFwColorR;
	else	
		this.setFwColor = this.setFwColorG;
	s -= Math.random()/4;
	this.dx = s*Math.sin(a);
	this.dy = s*Math.cos(a) - 2;
}
JSFX.FireworkSpark.prototype.fire = function(sx, sy, fw, cl)
{
	if(cl==1)
		this.setFwColor = this.setFwColorR;
	else if(cl==2)
		this.setFwColor = this.setFwColorC;
	else if(cl==3)
		this.setFwColor = this.setFwColorG;
	else if(cl==4)
		this.setFwColor = this.setFwColorW;
	else
		this.setFwColor = this.setFwColorY;
	
	if(fw == 1)
		this.fire1();
	else if(fw == 2)
		this.fire2();
	else if(fw == 3)
		this.fire3();
	else if(fw == 4)
		this.fire4();
	else
		this.fire0();

	this.x	= sx;
	this.y	= sy;
	this.moveTo(sx, sy);
}
JSFX.FireworkSpark.prototype.setFwColor = function(color)
{
	this.setFwColorY(color);
}
JSFX.FireworkSpark.prototype.setFwColorR = function(color)
{
	var hex = dec2hex(color);
	var str = "#" + hex + "0000";
	this.setBgColor(str);
}
JSFX.FireworkSpark.prototype.setFwColorG = function(color)
{
	var hex = dec2hex(color);
	var str = "#" + "00" + hex + "00";
	this.setBgColor(str);
}
JSFX.FireworkSpark.prototype.setFwColorC = function(color)
{
	var hex = dec2hex(color);
	var str = "#" + "00" + hex + hex;
	this.setBgColor(str);
}
JSFX.FireworkSpark.prototype.setFwColorY = function(color)
{
	var hex = dec2hex(color);
	var str = "#" + hex + hex + "00";
	this.setBgColor(str);
}
JSFX.FireworkSpark.prototype.setFwColorW = function(color)
{
	var hex = dec2hex(color);
	var str = "#" + hex + hex + hex;
	this.setBgColor(str);
}
JSFX.FireworkSpark.prototype.animate = function(step)
{
	var color = (step < 30) ? 255-(step*4) : Math.random()*(356-(step*4));
	this.setFwColor(color);
	
	this.dy += this.ay;
	this.x += this.dx;
	this.y += this.dy;
	this.moveTo(this.x, this.y);
}
/*** END Class FireworkSpark Methods***/

/*** Class FireObj extends Object ***/
JSFX.FireObj = function(numStars, x, y)
{
	this.id = "JSFX_FireObj_"+JSFX.FireObj.count++;
	this.sparks = new Array();
	for(i=0 ; i<numStars; i++)
	{
		this.sparks[i]=new JSFX.FireworkSpark(x,y);
		this.sparks[i].clip(0,0,3,3);
		this.sparks[i].setBgColor("yellow");
	}
	this.step = 0;
	window[this.id]=this;
}
JSFX.FireObj.count = 0;
JSFX.FireObj.prototype.explode = function()
{
	var x = (50 + (Math.random() * (gX()-150)));
	var y = (50 + (Math.random() * (gY()-150)));
	var fw = Math.floor(Math.random() * 5);
	var cl = Math.floor(Math.random() * 5);

	for(i=0 ; i<this.sparks.length ; i++)
		this.sparks[i].fire(x, y, fw, cl);
}
JSFX.FireObj.prototype.animate = function()
{
	setTimeout("window."+this.id+".animate()", 40);

	if(this.step > 50)this.step = 0;
	if(this.step == 0)this.explode();

	this.step++;

	for(i=0 ; i<this.sparks.length ; i++)
		this.sparks[i].animate(this.step);

}
/*** END Class FireObj***/
JSFX.FWStart = function()
{
	if(JSFX.FWLoad)JSFX.FWLoad();
	myFW1.animate();
	setTimeout("myFW2.animate()", 1000);
}
myFW1 = new JSFX.FireObj(20, 10, 10);
myFW2 = new JSFX.FireObj(20, 10, 10);
JSFX.FWLoad=window.onload;
window.onload=JSFX.FWStart;