<!--
  // preload the menu bar images
var menuBarImageNames = new Array( "home", "about", "contact", "links" );
numberOfMenuBarImages = menuBarImageNames.length;
menuBarOnImages = new Array( numberOfMenuBarImages );
menuBarOffImages = new Array( numberOfMenuBarImages );

for( var i=0 ; i<numberOfMenuBarImages ; i++ )
 {
  menuBarOnImages[i] = new Image( 60, 22 );
  menuBarOnImages[i].src = "images/" + menuBarImageNames[i] + "_on.gif";
  menuBarOffImages[i] = new Image( 60, 22 );
  menuBarOffImages[i].src = "images/" + menuBarImageNames[i] + "_off.gif";
 }

  // preload navigation menu
var navMenuImageNames = new Array( "capabilities", "embsys", "softfirm", "motion", "analog", "digital", "optical", "rf", "ate" );
numberOfNavMenuImages = navMenuImageNames.length;
navMenuOnImages = new Array( numberOfNavMenuImages );
navMenuOffImages = new Array( numberOfNavMenuImages );

for( var i=0 ; i<numberOfNavMenuImages ; i++ )
 {
  navMenuOnImages[i] = new Image( 144, 22 );
  navMenuOnImages[i].src = "images/" + navMenuImageNames[i] + "_on.gif";
  navMenuOffImages[i] = new Image( 144, 22 );
  navMenuOffImages[i].src = "images/" + navMenuImageNames[i] + "_off.gif";
 }

function menuBarRollOn( index )
 {
  if( document.images )
    document.images[menuBarImageNames[index]].src = menuBarOnImages[index].src; 
 } 

function menuBarRollOff( index )
 {
  if( document.images )
    document.images[menuBarImageNames[index]].src = menuBarOffImages[index].src; 
 }  

function navMenuRollOn( index )
 {
  if( document.images )
    document.images[navMenuImageNames[index]].src = navMenuOnImages[index].src; 
 } 

function navMenuRollOff( index )
 {
  if( document.images )
    document.images[navMenuImageNames[index]].src = navMenuOffImages[index].src; 
 }
// -->