if (document.images) {	

	sub_admissions1_on = new Image();				sub_admissions1_on.src="images/navigation/sub_admissions1b.gif";  
	sub_admissions1_off = new Image(); 				sub_admissions1_off.src="images/navigation/sub_admissions1a.gif";  
	
   	sub_admissions2_on = new Image();				sub_admissions2_on.src="images/navigation/sub_admissions2b.gif";  
	sub_admissions2_off = new Image(); 				sub_admissions2_off.src="images/navigation/sub_admissions2a.gif";  
	
   	sub_admissions3_on = new Image();				sub_admissions3_on.src="images/navigation/sub_admissions3b.gif";  
	sub_admissions3_off = new Image(); 				sub_admissions3_off.src="images/navigation/sub_admissions3a.gif";  

	sub_admissions4_on = new Image();				sub_admissions4_on.src="images/navigation/sub_admissions4b.gif";  
	sub_admissions4_off = new Image(); 				sub_admissions4_off.src="images/navigation/sub_admissions4a.gif";  
	
}