/***********************************************
* Floating image script- By Virtual_Max (http://www.geocities.com/siliconvalley/lakes/8620)
* Modified by Dynamic Drive for various improvements
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/



var vmin=2;

var vmax=5;

var vr=2;

var timer1;


function iecompattest()
{

 return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body

}



function Chip(chipname,width,height)
{
 
this.named=chipname;

this.vx=vmin+vmax*Math.random();
 
this.vy=vmin+vmax*Math.random();
 
this.w=width+20;
 
this.h=height;
 
this.xx=0;
 
this.yy=0;
 
this.timer1=null;

}



function stopchip(chipname)
{
 if (document.getElementById)
 {
eval("chip="+chipname);
}   
 document.getElementById(chip.named).style.visibility='hidden'; 
 clearTimeout(chip.timer1);
 

 // t= setTimeout('função()',1000) - ordena a execução da função cada 1000 ms
 // clearTimeout(t) - interrompe essa execução periódica

}


function movechip(chipname)
{

if (document.getElementById)
 {
eval("chip="+chipname);
   
if (window.innerWidth || window.opera)
 {
pageX=window.pageXOffset;

  pageW=window.innerWidth-40;
     
  pageY=window.pageYOffset;
     
  pageH=window.innerHeight-20;
   
 }
   
else if (document.body)
 {
		 
  pageX=iecompattest().scrollLeft;
     
  pageW=iecompattest().offsetWidth-40;
     
  pageY=iecompattest().scrollTop;
     
  pageH=iecompattest().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();
     
}


document.getElementById(chip.named).style.left=chip.xx+"px";

document.getElementById(chip.named).style.top=chip.yy+"px";


   
chip.timer1=setTimeout("movechip('"+chip.named+"')",100);
  
}

}