if (document.images)
{
  pic1 = new Image(); 
  pic1.src = "gfx/box_dalton_over.jpg"; 

  pic2 = new Image(); 
  pic2.src = "gfx/box_basisschool_over.jpg"; 

  pic3 = new Image(); 
  pic3.src = "gfx/box_middenschool_over.jpg";
  
  pic4 = new Image(); 
  pic4.src = "gfx/box_bovenschool_over.jpg";
  
  pic5 = new Image(); 
  pic5.src = "gfx/box_internaat_over.jpg";
  
  pic6 = new Image(); 
  pic6.src = "gfx/nav_button_over.gif";
  
  pic7 = new Image(); 
  pic7.src = "gfx/box_small_dalton_over.jpg";
  
  pic8 = new Image(); 
  pic8.src = "gfx/box_small_basisschool_over.jpg";
  
  pic9 = new Image(); 
  pic9.src = "gfx/box_small_middenschool_over.jpg";
  
  pic10 = new Image(); 
  pic10.src = "gfx/box_small_bovenschool_over.jpg";
  
  pic11 = new Image(); 
  pic11.src = "gfx/box_small_creche_over.jpg";
  
  pic12 = new Image(); 
  pic12.src = "gfx/box_creche_over.jpg";

}