//Autumn leaves- by Kurt Grigg (kurt.grigg@virgin.net)
//Modified by Dynamic Drive for NS6 functionality
//visit http://www.dynamicdrive.com for this script

//Pre-load your image below!
leaves_grphcs=new Array(6)
leaves_Image0=new Image();
leaves_Image0.src=leaves_grphcs[0]="images/al.gif";
leaves_Image1=new Image();
leaves_Image1.src=leaves_grphcs[1]="images/bl.gif"
leaves_Image2=new Image();
leaves_Image2.src=leaves_grphcs[2]="images/cl.gif"
leaves_Image3=new Image();
leaves_Image3.src=leaves_grphcs[3]="images/dl.gif"
leaves_Image4=new Image();
leaves_Image4.src=leaves_grphcs[4]="images/el.gif"
leaves_Image5=new Image();
leaves_Image5.src=leaves_grphcs[5]="images/fl.gif" 

leaves_Amount=12; //Smoothness depends on image file size, the smaller the size the more you can use!
leaves_Ypos=new Array();
leaves_Xpos=new Array();
leaves_Speed=new Array();
leaves_Step=new Array();
leaves_Cstep=new Array();
leaves_ns=(document.layers)?1:0;
leaves_ns6=(document.getElementById&&!document.all)?1:0;

if (leaves_ns){
for (leaves_i = 0; leaves_i < leaves_Amount; leaves_i++){
var leaves_P=Math.floor(Math.random()*leaves_grphcs.length);
leaves_rndPic=leaves_grphcs[P];
document.write("<LAYER NAME='sn"+leaves_i+"' LEFT=0 TOP=0><img src="+rndPic+"></LAYER>");
}
}
else{
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (leaves_i = 0; leaves_i < leaves_Amount; leaves_i++){
var leaves_P=Math.floor(Math.random()*leaves_grphcs.length);
leaves_rndPic=leaves_grphcs[leaves_P];
document.write('<img id="si'+leaves_i+'" src="'+leaves_rndPic+'" style="position:absolute;top:0px;left:0px">');
}
document.write('</div></div>');
}
leaves_WinHeight=(leaves_ns||leaves_ns6)?window.innerHeight:window.document.body.clientHeight;
leaves_WinWidth=(leaves_ns||leaves_ns6)?window.innerWidth-70:window.document.body.clientWidth;
for (leaves_i=0; leaves_i < leaves_Amount; leaves_i++){                                                                
 leaves_Ypos[leaves_i] = Math.round(Math.random()*leaves_WinHeight);
 leaves_Xpos[leaves_i] = Math.round(Math.random()*leaves_WinWidth);
 leaves_Speed[leaves_i]= Math.random()*3+1;
 leaves_Cstep[leaves_i]=0;
 leaves_Step[leaves_i]=Math.random()*0.1+0.05;
}
function leaves_fall(){
var leaves_WinHeight=(leaves_ns||leaves_ns6)?window.innerHeight:window.document.body.clientHeight;
var leaves_WinWidth=(leaves_ns||leaves_ns6)?window.innerWidth-70:window.document.body.clientWidth;
var leaves_hscrll=(leaves_ns||leaves_ns6)?window.pageYOffset:document.body.scrollTop;
var leaves_wscrll=(leaves_ns||leaves_ns6)?window.pageXOffset:document.body.scrollLeft;
for (leaves_i=0; leaves_i < leaves_Amount; leaves_i++){
leaves_sy = leaves_Speed[leaves_i]*Math.sin(90*Math.PI/180);
leaves_sx = leaves_Speed[leaves_i]*Math.cos(leaves_Cstep[leaves_i]);
leaves_Ypos[leaves_i]+=leaves_sy;
leaves_Xpos[leaves_i]+=leaves_sx; 
if (leaves_Ypos[leaves_i] > leaves_WinHeight){
leaves_Ypos[leaves_i]=-60;
leaves_Xpos[leaves_i]=Math.round(Math.random()*leaves_WinWidth);
leaves_Speed[leaves_i]=Math.random()*3+1;
}
if (leaves_ns){
document.layers['sn'+leaves_i].left=leaves_Xpos[leaves_i];
document.layers['sn'+leaves_i].top=leaves_Ypos[leaves_i]+leaves_hscrll;
}
else if (leaves_ns6){
document.getElementById("si"+leaves_i).style.left=Math.min(leaves_WinWidth,leaves_Xpos[leaves_i]);
document.getElementById("si"+leaves_i).style.top=leaves_Ypos[leaves_i]+leaves_hscrll;
}
else{
eval("document.all.si"+leaves_i).style.left=leaves_Xpos[leaves_i];
eval("document.all.si"+leaves_i).style.top=leaves_Ypos[leaves_i]+leaves_hscrll;
} 
leaves_Cstep[leaves_i]+=leaves_Step[leaves_i];
}
setTimeout('leaves_fall()',20);
}


/*
Flying Butterfly
*/

var Ymax=8;                                //MAX # OF PIXEL STEPS IN THE "X" DIRECTION
var Xmax=8;                                //MAX # OF PIXEL STEPS IN THE "Y" DIRECTION
var Tmax=10000;                        //MAX # OF MILLISECONDS BETWEEN PARAMETER CHANGES

//FLOATING IMAGE URLS FOR EACH IMAGE. ADD OR DELETE ENTRIES. KEEP ELEMENT NUMERICAL ORDER STARTING WITH "0" !!

var floatimages=new Array();
floatimages[0]='images/butterfly2.gif';
floatimages[1]='images/butterfly2.gif';

//*********DO NOT EDIT BELOW***********
var NS4 = (navigator.appName.indexOf("Netscape")>=0 && parseFloat(navigator.appVersion) >= 4 && parseFloat(navigator.appVersion) < 5)? true : false;
var IE4 = (document.all)? true : false;
var NS6 = (parseFloat(navigator.appVersion) >= 5 && navigator.appName.indexOf("Netscape")>=0 )? true: false;
var wind_w, wind_h, t='', IDs=new Array();
for(i=0; i<floatimages.length; i++){
t+=(NS4)?'<layer name="pic'+i+'" visibility="hide" width="10" height="10"><a href="javascript:hidebutterfly()">' : '<div id="pic'+i+'" style="position:absolute; visibility:hidden;width:10px; height:10px"><a href="javascript:hidebutterfly()">';
t+='<img src="'+floatimages[i]+'" name="p'+i+'" border="0">';
t+=(NS4)? '</a></layer>':'</a></div>';
}
document.write(t);

function moveimage(num){
if(getidleft(num)+IDs[num].W+IDs[num].Xstep >= wind_w+getscrollx())IDs[num].Xdir=false;
if(getidleft(num)-IDs[num].Xstep<=getscrollx())IDs[num].Xdir=true;
if(getidtop(num)+IDs[num].H+IDs[num].Ystep >= wind_h+getscrolly())IDs[num].Ydir=false;
if(getidtop(num)-IDs[num].Ystep<=getscrolly())IDs[num].Ydir=true;
moveidby(num, (IDs[num].Xdir)? IDs[num].Xstep :  -IDs[num].Xstep , (IDs[num].Ydir)?  IDs[num].Ystep:  -IDs[num].Ystep);
}

function getnewprops(num){
IDs[num].Ydir=Math.floor(Math.random()*2)>0;
IDs[num].Xdir=Math.floor(Math.random()*2)>0;
IDs[num].Ystep=Math.ceil(Math.random()*Ymax);
IDs[num].Xstep=Math.ceil(Math.random()*Xmax)
setTimeout('getnewprops('+num+')', Math.floor(Math.random()*Tmax));
}

function getscrollx(){
if(NS4 || NS6)return window.pageXOffset;
if(IE4)return document.body.scrollLeft;
}

function getscrolly(){
if(NS4 || NS6)return window.pageYOffset;
if(IE4)return document.body.scrollTop;
}

function getid(name){
if(NS4)return document.layers[name];
if(IE4)return document.all[name];
if(NS6)return document.getElementById(name);
}

function moveidto(num,x,y){
if(NS4)IDs[num].moveTo(x,y);
if(IE4 || NS6){
IDs[num].style.left=x+'px';
IDs[num].style.top=y+'px';
}}

function getidleft(num){
if(NS4)return IDs[num].left;
if(IE4 || NS6)return parseInt(IDs[num].style.left);
}

function getidtop(num){
if(NS4)return IDs[num].top;
if(IE4 || NS6)return parseInt(IDs[num].style.top);
}

function moveidby(num,dx,dy){
if(NS4)IDs[num].moveBy(dx, dy);
if(IE4 || NS6){
IDs[num].style.left=(getidleft(num)+dx)+'px';
IDs[num].style.top=(getidtop(num)+dy)+'px';
}}

function getwindowwidth(){
if(NS4 || NS6)return window.innerWidth;
if(IE4)return document.body.clientWidth;
}

function getwindowheight(){
if(NS4 || NS6)return window.innerHeight;
if(IE4)return document.body.clientHeight;
}

function init(){
wind_w=getwindowwidth();
wind_h=getwindowheight();
for(i=0; i<floatimages.length; i++){
IDs[i]=getid('pic'+i);
if(NS4){
IDs[i].W=IDs[i].document.images["p"+i].width;
IDs[i].H=IDs[i].document.images["p"+i].height;
}
if(NS6 || IE4){
IDs[i].W=document.images["p"+i].width;
IDs[i].H=document.images["p"+i].height;
}
getnewprops(i);
moveidto(i , Math.floor(Math.random()*(wind_w-IDs[i].W)), Math.floor(Math.random()*(wind_h-IDs[i].H)));
if(NS4)IDs[i].visibility = "show";
if(IE4 || NS6)IDs[i].style.visibility = "visible";
startfly=setInterval('moveimage('+i+')',Math.floor(Math.random()*100)+100);
}}

function hidebutterfly(){
for(i=0; i<floatimages.length; i++){
if (IE4)
eval("document.all.pic"+i+".style.visibility='hidden'")
else if (NS6)
document.getElementById("pic"+i).style.visibility='hidden'
else if (NS4)
eval("document.pic"+i+".visibility='hide'")
clearInterval(startfly)
}
}

if (NS4||NS6||IE4){
window.onload=allinit;
window.onresize=function(){ wind_w=getwindowwidth(); wind_h=getwindowheight(); }
}

function allinit()
{
    leaves_fall();
    init();
}


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