Bidirectional Background Mover

Insert your logo or graphic: <body background="logoat020.gif">
Cut & Paste in between tags <body> here </body>
Be sure to change background name in code as well

// please keep these lines on when you copy the source
// made by: Nicolas - http://www.javascript-page.com
//
// For Netscape NS6up , Modified by Roberto de Jesus Asyn Diaz
//        Web Site:  http://usuarios.lycos.es/asynco/ 
//        email   :  rasyn@lycos.es                    
//
var background = ""logoat020.gif"";
var speed = 0;

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

function moveback(movert,movedn,hPos,vPos) {
 
  if (arguments[4])
    document.body.style.backgroundImage = "url(\"" + arguments[4] + "\")";
 
  if (arguments[5])
    document.body.style.backgroundRepeat = arguments[5]
 
  if (!isNaN(hPos)) {
    if ((movert!=0) && (hPos>0)) hPos=-100000
    hPos += movert
  } 
  if (!isNaN(vPos)) {
    if ((movedn!=0) && (vPos>0)) vPos=-100000
    vPos+= movedn
  }
 
  document.body.style.backgroundPosition= hPos + " " + vPos
  if (isNaN(hPos))  hPos = "\"" + hPos + "\""
  if (isNaN(vPos)) vPos = "\"" + vPos + "\""
setTimeout("moveback("+movert+","+movedn+","+hPos+","+vPos+")",speed)
}
 
moveback(1,1,0,0, background);

/*
This is the URL of the background image you wish to animate. 
It is IMPERATIVE that you declare the URL of the image twice.
This is the speed at which the background moves.
This is the direction in which the background moves. 
The first "1" is the horizontal direction.
A "1" moves the background right, a "-1" moves it left, and a "0" keeps it put. 
The second "1" is the vertical direction.
A "1" moves the background down, a "-1" moves it up, and a "0" keeps it put.
*/
//-->
</script>

Simply Cut and Paste Script code
Be sure to properly place script position in Head & Body tag section of html
This script has been in the DesignerWiz.com Public Library.