// Preload the homepage images.
if( document.images ) 
{
  img_1 = new Image( );  
  img_1.src = "/images/front/a1_on.jpg"; 
  img_2 = new Image( );
  img_2.src = "/images/front/a2_on.jpg"; 
  img_3 = new Image( );
  img_3.src = "/images/front/a3_on.jpg"; 
  img_4 = new Image( );
  img_4.src = "/images/front/b1_on.jpg"; 
  img_5 = new Image( );
  img_5.src = "/images/front/b2_on.jpg"; 
  img_6 = new Image( );
  img_6.src = "/images/front/b3_on.jpg"; 
  img_7 = new Image( );
  img_7.src = "/images/front/c1_on.jpg"; 
  img_8 = new Image( );
  img_8.src = "/images/front/c2_on.jpg"; 
  img_9 = new Image( );
  img_9.src = "/images/front/c3_on.jpg"; 
}