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

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

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

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

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