if (document.images) {	

   	consumer_on= new Image();				consumer_on.src="images/consumer2.gif";  
	consumer_off= new Image();	 			consumer_off.src="images/consumer1.gif";

   	manufacturer_on= new Image();			manufacturer_on.src="images/manufacturer2.gif";  
	manufacturer_off= new Image(); 			manufacturer_off.src="images/manufacturer1.gif";


   }