img_a=new Array ();
	    img_n=new Array ();
    	
	    img_a[1]=new Image ();
	    img_n[1]=new Image ();
	    img_a[1].src="img/button1a.jpg";
	    img_n[1].src="img/button1.jpg";
	      
	    img_a[2]=new Image ();
	    img_n[2]=new Image ();
	    img_a[2].src="img/button2a.jpg";
	    img_n[2].src="img/button2.jpg";
	    
	    img_a[3]=new Image ();
	    img_n[3]=new Image ();
	    img_a[3].src="img/button3a.jpg";
	    img_n[3].src="img/button3.jpg";
	    
	    img_a[4]=new Image ();
	    img_n[4]=new Image ();
	    img_a[4].src="img/button4a.jpg";
	    img_n[4].src="img/button4.jpg";
	    
	    img_a[5]=new Image ();
	    img_n[5]=new Image ();
	    img_a[5].src="img/button5a.jpg";
	    img_n[5].src="img/button5.jpg";
		
	    
	    function On (number)
	    {
	        document.images["button"+number].src=img_a[number].src;
	    }
	    function Off (number)
	    {
	        document.images["button"+number].src=img_n[number].src;
	    }