if( document.images )
{

  but1 = new Image(150,49) ;
  but1.src = "images/1off.gif";
  but2 = new Image(150,49) ;
  but2.src = "images/1on.gif";
  
  but3 = new Image(150,49) ;
  but3.src = "images/2off.gif";
  but4 = new Image(150,49) ;
  but4.src = "images/2on.gif";
  
  but5 = new Image(150,49) ;
  but5.src = "images/3off.gif";
  but6 = new Image(150,49) ;
  but6.src = "images/3on.gif"; 
  
  but7 = new Image(150,49) ;
  but7.src = "images/4off.gif";
  but8 = new Image(150,49) ;
  but8.src = "images/4on.gif"; 
  
  but9 = new Image(150,49) ;
  but9.src = "images/5off.gif";
  but10 = new Image(150,49) ;
  but10.src = "images/5on.gif"; 
  
  but11 = new Image(150,49) ;
  but11.src = "images/6off.gif";
  but12 = new Image(150,49) ;
  but12.src = "images/6on.gif"; 
  
  but13 = new Image(150,49) ;
  but13.src = "images/7off.gif";
  but14 = new Image(150,49) ;
  but14.src = "images/7on.gif"; 
  
  but15 = new Image(150,49) ;
  but15.src = "images/8off.gif";
  but16 = new Image(150,49) ;
  but16.src = "images/8on.gif"; 
  
  but17 = new Image(150,49) ;
  but17.src = "images/9off.gif";
  but18 = new Image(150,49) ;
  but18.src = "images/9on.gif"; 
  
  
  }
  
   
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")
}