if( document.images )
{
<!--Small button-->
  but1 = new Image(121,50) ;
  but1.src = "images/but1-off.jpg";
  but2 = new Image(121,50) ;
  but2.src = "images/but1-on.jpg";
  but3 = new Image(121,50) ;
  but3.src = "images/but2-off.jpg";
  but4 = new Image(121,50) ;
  but4.src = "images/but2-on.jpg";
  but5 = new Image(121,50) ;
  but5.src = "images/but3-off.jpg";
  but6 = new Image(121,50) ;
  but6.src = "images/but3-on.jpg";

  but7 = new Image(121,50) ;
  but7.src = "images/but4-off.jpg";
  but8 = new Image(121,50) ;
  but8.src = "images/but4-on.jpg";  
 
  but9 = new Image(121,50) ;
  but9.src = "images/but5-off.jpg";
  but10 = new Image(121,50) ;
  but10.src = "images/but5-on.jpg";

  but11 = new Image(121,50) ;
  but11.src = "images/but6-off.jpg";
  but12 = new Image(121,50) ;
  but12.src = "images/but6-on.jpg";

  but13 = new Image(121,50) ;
  but13.src = "images/but7-off.jpg";
  but14 = new Image(121,50) ;
  but14.src = "images/but7-on.jpg";

  }

<!--
function chkVer(imagename,objectsrc)
{
var n=navigator.appName
var v=parseInt(navigator.appVersion)
var browsok=((n=="Netscape")&&(v>=3))
var browsok2=((n=="Microsoft Internet Explorer")&&(v>=4))
if ((browsok)||(browsok2))
document.images[imagename].src=eval(objectsrc+".src")
}
//-->