var brOK=true;
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)
		}
	}
}