var brOK=false;
var mie=false;
var aver=parseInt(navigator.appVersion.substring(0,1));
var aname=navigator.appName;

function checkbrOK(){
	if(aname.indexOf("Internet Explorer")!=-1){
		if(aver>=4) brOK=navigator.javaEnabled();
    mie=true;
  }
	if(aname.indexOf("Netscape")!=-1){
		if(aver>=4) brOK=navigator.javaEnabled();
	}
}

var vmin=2;
var vmax=5;
var vr=2;
var timer1;

function Chip(chipname,width,height){
	this.named=chipname;
	this.vx=vmin+vmax*Math.random();
	this.vy=vmin+vmax*Math.random();
	this.w=width;
	this.h=height;
	this.xx=0;
	this.yy=0;
	this.timer1=null;
}

function movechip(chipname){
	if(brOK){
		eval("chip="+chipname);
		if(!mie){
			pageX=window.pageXOffset;
			pageW=window.innerWidth;
			pageY=window.pageYOffset;
			pageH=window.innerHeight;
		}else{
			pageX=window.document.body.scrollLeft;
			pageW=window.document.body.offsetWidth-8;
			pageY=window.document.body.scrollTop;
			pageH=window.document.body.offsetHeight;
		}
		chip.xx=chip.xx+chip.vx;
		chip.yy=chip.yy+chip.vy;
		chip.vx+=vr*(Math.random()-0.5);
		chip.vy+=vr*(Math.random()-0.5);
		if(chip.vx>(vmax+vmin))  chip.vx=(vmax+vmin)*2-chip.vx;
		if(chip.vx<(-vmax-vmin)) chip.vx=(-vmax-vmin)*2-chip.vx;
		if(chip.vy>(vmax+vmin))  chip.vy=(vmax+vmin)*2-chip.vy;
		if(chip.vy<(-vmax-vmin)) chip.vy=(-vmax-vmin)*2-chip.vy;
		if(chip.xx<=pageX){
			chip.xx=pageX;
			chip.vx=vmin+vmax*Math.random();
		}
		if(chip.xx>=pageX+pageW-chip.w){
			chip.xx=pageX+pageW-chip.w;
			chip.vx=-vmin-vmax*Math.random();
		}
		if(chip.yy<=pageY){
			chip.yy=pageY;
			chip.vy=vmin+vmax*Math.random();
		}
		if(chip.yy>=pageY+pageH-chip.h){
			chip.yy=pageY+pageH-chip.h;
			chip.vy=-vmin-vmax*Math.random();
		}
		if(!mie){
			eval('document.'+chip.named+'.top ='+chip.yy);
			eval('document.'+chip.named+'.left='+chip.xx);
		}else{
			eval('document.all.'+chip.named+'.style.pixelLeft='+chip.xx);
			eval('document.all.'+chip.named+'.style.pixelTop ='+chip.yy);
		}
		chip.timer1=setTimeout("movechip('"+chip.named+"')",100);
	}
}

function stopme(chipname){
	if(brOK){
		eval("chip="+chipname);
		if(chip.timer1!=null) clearTimeout(chip.timer1);
  }
}

var chip1;
var chip2;
//add or delete more variables, depending on how many images you're using

function pagestart(){
	checkbrOK();
	chip1=new Chip("chip1",190,180);
	chip2=new Chip("chip2",10,20);
 //add or delete more of the above, depending on how many images you're using
	if(brOK){
		movechip("chip1");
		movechip("chip2");
     //add or delete more of the above, depending on how many images you're using
	}
}