if (document.images) {	
	
   	info_on= new Image();				info_on.src="images/navigation/info2.gif";  
   	info_off= new Image();				info_off.src="images/navigation/info1.gif";  

	directory_on= new Image();			directory_on.src="images/navigation/directory2.gif";  
   	directory_off= new Image();			directory_off.src="images/navigation/directory1.gif";  

	email_on= new Image();				email_on.src="images/navigation/email2.gif";  
   	email_off= new Image();				email_off.src="images/navigation/email1.gif";  
}