if (document.images)
{
  pic1= new Image(); 
  pic1.src="../templates/promoshome/home/images/landscapes-hover.jpg"; 

  pic2= new Image(); 
  pic2.src="../templates/promoshome/home/images/people-hover.jpg"; 
  
  pic3= new Image(); 
  pic3.src="../templates/promoshome/home/images/nature-hover.jpg"; 
  
  pic4= new Image(); 
  pic4.src="../templates/promoshome/home/images/urban-hover.jpg"; 

}