/***********************************************
* 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 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);
	
	}
}