if (document.images) {	

   	enter_on = new Image();					enter_on.src="images/splash/enter2.gif";  
	enter_off= new Image(); 				enter_off.src="images/splash/enter1.gif";
	
	cmu_on = new Image();					cmu_on.src="images/splash/cmu2.gif";  
	cmu_off= new Image(); 					cmu_off.src="images/splash/cmu1.gif";
	
   	cfa_on = new Image();					cfa_on.src="images/splash/cfa2.gif";  
	cfa_off= new Image(); 					cfa_off.src="images/splash/cfa1.gif";

   	som_on = new Image();					som_on.src="images/splash/som2.gif";  
	som_off= new Image(); 					som_off.src="images/splash/som1.gif";
}