grphcs=new Array(1) 

//PRELOAD the involved images (extend or contract variables according to # of images used)
Image0=new Image();
Image0.src=grphcs[0]="/summerreading/images/balloon.gif";


//SPECIFY number of images to randomly display concurrently from list above. Less the more efficient
Amount=1; 
Ypos=new Array();
Xpos=new Array();
Speed=new Array();
Step=new Array();
Cstep=new Array();
ns=(document.layers)?1:0;
ns6=(document.getElementById&&!document.all)?1:0;
ie=document.all;

if (ns){
	for (i = 0; i < Amount; i++){
		var P=Math.floor(Math.random()*grphcs.length);
		rndPic=grphcs[P];
		
		document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0><img src="+rndPic+"></LAYER>");
	}
}

else{
	
	document.write('<div id="MyDiv" style="z-index: 2; display: none; position:absolute;top:90px;left:0px; width: 720px; height: 210px; overflow:hidden;"><div style="position:relative; ">');
	for (i = 0; i < Amount; i++){
		var P=Math.floor(Math.random()*grphcs.length);
		rndPic=grphcs[P];
		document.write('<img id="si'+i+'" src="'+rndPic+'" style="position:absolute;top:0px;left:0px">');
	}
	document.write('</div></div>');
}

WinHeight=(ns||ns6)?window.innerHeight-70:window.document.body.clientHeight;
WinWidth=(ns||ns6)?window.innerWidth:window.document.body.clientWidth;
var scrOfX = 0, scrOfY = 0;

for (i=0; i < Amount; i++){                                                                
 //Ypos[i] = Math.round(Math.random()*WinHeight);
 //Xpos[i] = Math.round(Math.random()*WinWidth);
 //Speed[i]= Math.random()*5+1;
  Ypos[i] = 0;
 Xpos[i] = (WinWidth/2)-850;
 Speed[i]= 1;
 Cstep[i]=0;
 Step[i]=Math.random()*0.1+0.05;
}
var offSet = 0;

function fly(){
	document.getElementById("MyDiv").style.display="";
	var WinHeight=(ns||ns6)?window.innerHeight:window.document.body.clientHeight;
	var WinWidth=(ns||ns6)?window.innerWidth-70:window.document.body.clientWidth;
	var hscrll=(ns||ns6)?window.pageYOffset:document.body.scrollTop;
	var wscrll=(ns||ns6)?window.pageXOffset:document.body.scrollLeft;


	if(ns6)
	{
		document.getElementById("MyDiv").style.left = document.images.Start.offsetLeft;
	}
	else
	{
		document.all.MyDiv.style.left= (WinWidth/2)-360;
		}
	var TableWidth=720
	
	
	for (i=0; i < Amount; i++){

		sy = Speed[i]*Math.sin(Cstep[i]);
		sx = Speed[i]*2;
		Ypos[i]+=sy;
		Xpos[i]+=sx; 
		/*
		if (Xpos[i] > TableWidth){
		
			//Ypos[i]=Math.round(Math.random()*WinHeight);
			//Xpos[i]=-60;
			Speed[i]=1;
			Ypos[i] = 0;
			Xpos[i] = (WinWidth/2)-850;
		}
		*/
		if (ns){
			document.layers['sn'+i].left=Xpos[i]+wscrll;
			document.layers['sn'+i].top=Ypos[i];
		}
		
		else if (ns6){
			document.getElementById("si"+i).style.left=Xpos[i]+wscrll;
			document.getElementById("si"+i).style.top=Math.min(WinHeight,Ypos[i]);
		}
		
		else{
			eval("document.all.si"+i).style.left=Xpos[i]+wscrll;
			eval("document.all.si"+i).style.top=Ypos[i];
		} 
		Cstep[i]+=Step[i];
	}
	if (Xpos[0] < TableWidth)
	{
		setTimeout('fly()',20);
	}
	else if(ns6)
	{
		document.getElementById("MyDiv").style.display="none";
	}
}
/*
if (ie||ns||ns6)
window.onload=fly
*/