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=1; 
  var vmax=2; 
  var vr=1; 
  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=100; 
  this.yy=200; 
  this.timer1=null; 
  } 
  
  function movechip(chipname) 
  { 
  if(brOK) 
  {eval("chip="+chipname); 
    if(!mie) 
    {pageX=window.pageXOffset; 
    pageW=window.innerWidth-20; 
    pageY=window.pageYOffset; 
    pageH=window.innerHeight-20; 
    } 
    else 
    {pageX=window.document.body.scrollLeft; 
    pageW=window.document.body.offsetWidth-20; 
    pageY=window.document.body.scrollTop; 
    pageH=window.document.body.offsetHeight-20; 
    }   
  
    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(document.layers) 
      {eval('document.'+chip.named+'.top ='+chip.yy); 
      eval('document.'+chip.named+'.left='+chip.xx); 
      }   
    else if (document.all) 
      {eval('document.all.'+chip.named+'.style.pixelLeft='+chip.xx); 
      eval('document.all.'+chip.named+'.style.pixelTop ='+chip.yy);   
      } 
    else if (document.getElementById) 
      {document.getElementById(chip.named).style.left=chip.xx; 
      document.getElementById(chip.named).style.top =chip.yy;   
      } 
    chip.timer1=setTimeout("movechip('"+chip.named+"')",100); 
  } 
  } 
  
  
  function stopme(chipname) 
  {if(brOK) 
  {//alert(chipname) 
    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",60,80); 
  chip2=new Chip("chip2",80,20); 
  //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 
  } 
  }