img11on = new Image();
        img11on.src ='images/bu11b.jpg';
        img11off = new Image();
        img11off.src ='images/bu11.jpg';
        img12on = new Image();
        img12on.src ='images/bu12b.jpg';
        img12off = new Image();
        img12off.src ='images/bu12.jpg';
        img13on = new Image();
        img13on.src ='images/bu13b.jpg';
        img13off = new Image();
        img13off.src ='images/bu13.jpg';
        img14on = new Image();
        img14on.src ='images/bu14b.jpg';
        img14off = new Image();
        img14off.src ='images/bu14.jpg';
        img15on = new Image();
        img15on.src ='images/bu15b.jpg';
        img15off = new Image();
        img15off.src ='images/bu15.jpg';
        img16on = new Image();
        img16on.src ='images/bu16b.jpg';
        img16off = new Image();
        img16off.src ='images/bu16.jpg';
        img17on = new Image();
        img17on.src ='images/bu17b.jpg';
        img17off = new Image();
        img17off.src ='images/bu17.jpg';
        img18on = new Image();
        img18on.src ='images/bu18b.jpg';
        img18off = new Image();
        img18off.src ='images/bu18.jpg';
        img19on = new Image();
        img19on.src ='images/bu19b.jpg';
        img19off = new Image();
        img19off.src ='images/bu19.jpg';
        img40on = new Image();
        img40on.src ='images/bu40b.jpg';
        img40off = new Image();
        img40off.src ='images/bu40.jpg';
                
        img1on = new Image();
        img1on.src ='images/b1b.jpg';
        img1off = new Image();
        img1off.src ='images/b1.jpg';
        img2on = new Image();
        img2on.src ='images/b2b.jpg';
        img2off = new Image();
        img2off.src ='images/b2.jpg';
        img3on = new Image();
        img3on.src ='images/b3b.jpg';
        img3off = new Image();   
        img3off.src ='images/b3.jpg';
        img4on = new Image();
        img4on.src ='images/b4b.jpg';
        img4off = new Image();   
        img4off.src ='images/b4.jpg';
        img5on = new Image();  
        img5on.src ='images/b5b.jpg';
        img5off = new Image();   
        img5off.src ='images/b5.jpg';
        img6on = new Image();
        img6on.src ='images/b6b.jpg';
        img6off = new Image();   
        img6off.src ='images/b6.jpg';
        img7on = new Image();
        img7on.src ='images/b7b.jpg';
        img7off = new Image();
        img7off.src ='images/b7.jpg';
        img8on = new Image();
        img8on.src ='images/b8b.jpg';
        img8off = new Image();
        img8off.src ='images/b8.jpg';
        img9on = new Image();
        img9on.src ='images/b9b.jpg';
        img9off = new Image();
        img9off.src ='images/b9.jpg';
        img10on = new Image();
        img10on.src ='images/b10b.jpg';
        img10off = new Image();
        img10off.src ='images/b10.jpg';
        
function imgOn(imgName) 
	{
        document[imgName].src = eval(imgName + 'on.src');
	}

function imgOff(imgName) 
	{
        document[imgName].src = eval(imgName + 'off.src');
	}