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