var brOK=false;
var mie=false;
var aver=parseInt(navigator.appVersion.substring(0,1));
var aname=navigator.appName;
var shark;
var vmin=2;
var vmax=5;
var vr=2;
var timer1;

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();
	}
}

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+"')",500);
    }
}

/*
	window.open("","Hi","top=0,height=220,left=80,width=265,toolbar=no,scrollbars=no,resizable=no,location=no")
*/
function movinglogo()
{
    checkbrOK(); 
    shark=new Chip("shark",550,350);
    if(brOK)
    {
        movechip("shark");
    }

}