if (document.images)
{
  pic1= new Image(530,310); 
  pic1.src="images/map.over.australasia.gif"; 

  pic2= new Image(530,310); 
  pic2.src="images/map.over.africa.gif"; 

  pic3= new Image(530,310); 
  pic3.src="images/map.over.central.america.gif"; 

  pic4= new Image(530,310); 
  pic4.src="images/map.over.east.asia.gif"; 

  pic5= new Image(530,310); 
  pic5.src="images/map.over.europe.gif"; 

  pic6= new Image(530,310); 
  pic6.src="images/map.over.middle.east.gif"; 

  pic7= new Image(530,310); 
  pic7.src="images/map.over.north.america.gif"; 

  pic8= new Image(530,310); 
  pic8.src="images/map.over.south.america.gif"; 

  pic9= new Image(530,310); 
  pic9.src="images/map.over.south.asia.gif"; 

  pic10= new Image(530,310); 
  pic10.src="images/map.over.southeast.asia.gif"; 
}