if (document.images)
{
  pic1= new Image(270,285); 
  pic1.src="../images/map.over.botswana2.gif"; 

  pic2= new Image(270,285); 
  pic2.src="../images/map.over.egypt2.gif"; 

  pic3= new Image(270,285); 
  pic3.src="../images/map.over.south.africa2.gif"; 

  pic4= new Image(270,285); 
  pic4.src="../images/map.over.nigeria2.gif"; 

  pic5= new Image(270,285); 
  pic5.src="../images/map.over.tanzania2.gif"; 

  pic6= new Image(270,285); 
  pic6.src="../images/map.over.ghana2.gif"; 
}