if( document.images )
{
<!--Small button-->
  top_but1 = new Image(150,30) ;
  top_but1.src = "images/fp_prod_btn1_off.gif";
  top_but2 = new Image(150,30) ;
  top_but2.src = "images/fp_prod_btn1_on.gif";

  top_but3 = new Image(150,30) ;
  top_but3.src = "images/fp_prod_btn2_off.gif";
  top_but4 = new Image(150,30) ;
  top_but4.src = "images/fp_prod_btn2_on.gif";
  
  top_but5 = new Image(150,30) ;
  top_but5.src = "images/fp_prod_btn3_off.gif";
  top_but6 = new Image(150,30) ;
  top_but6.src = "images/fp_prod_btn3_on.gif";

  top_but7 = new Image(150,30) ;
  top_but7.src = "images/fp_prod_btn4_off.gif";
  top_but8 = new Image(150,30) ;
  top_but8.src = "images/fp_prod_btn4_on.gif";  
  
  top_but9 = new Image(150,30) ;
  top_but9.src = "images/fp_prod_btn5_off.gif";
  top_but10 = new Image(150,30) ;
  top_but10.src = "images/fp_prod_btn5_on.gif";  
  
  top_but11 = new Image(150,30) ;
  top_but11.src = "images/fp_prod_btn6_off.gif";
  top_but12 = new Image(150,30) ;
  top_but12.src = "images/fp_prod_btn6_on.gif";  
 
  but1 = new Image(150,30) ;
  but1.src = "/images/nav_btn1_off.gif";
  but2 = new Image(150,30) ;
  but2.src = "/images/nav_btn1_on.gif";
  
  but3 = new Image(150,30) ;
  but3.src = "/images/nav_btn2_off.gif";
  but4 = new Image(150,30) ;
  but4.src = "/images/nav_btn2_on.gif";
  
  but5 = new Image(150,30) ;
  but5.src = "/images/nav_btn3_off.gif";
  but6 = new Image(150,30) ;
  but6.src = "/images/nav_btn3_on.gif";
  
  but7 = new Image(150,30) ;
  but7.src = "/images/nav_btn4_off.gif";
  but8 = new Image(150,30) ;
  but8.src = "/images/nav_btn4_on.gif";
  
  but9 = new Image(150,30) ;
  but9.src = "/images/nav_btn5_off.gif";
  but10 = new Image(150,30) ;
  but10.src = "/images/nav_btn5_on.gif";
  
  but11 = new Image(150,30) ;
  but11.src = "/images/nav_btn6_off.gif";
  but12 = new Image(150,30) ;
  but12.src = "/images/nav_btn6_on.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")
}
//-->