if (document.images) {	

 	agent1_on= new Image();				agent1_on.src="photos/agent1b.jpg";  
 	agent1_off= new Image();			agent1_off.src="photos/agent1a.jpg";  
	
 	agent2_on= new Image();				agent2_on.src="photos/agent2b.jpg";  
 	agent2_off= new Image();			agent2_off.src="photos/agent2a.jpg";  

 	agent3_on= new Image();				agent3_on.src="photos/agent3b.jpg";  
 	agent3_off= new Image();			agent3_off.src="photos/agent3a.jpg";  
	
 	agent4_on= new Image();				agent4_on.src="photos/agent4b.jpg";  
 	agent4_off= new Image();			agent4_off.src="photos/agent4a.jpg";  
	
 	agent5_on= new Image();				agent5_on.src="photos/agent5b.jpg";  
 	agent5_off= new Image();			agent5_off.src="photos/agent5a.jpg";  
	
 	agent6_on= new Image();				agent6_on.src="photos/agent6b.jpg";  
 	agent6_off= new Image();			agent6_off.src="photos/agent6a.jpg";  
	
}