if (document.images)
{ 

img1on = new Image ;    
img1off = new Image ;
 
img2on = new Image ;    
img2off = new Image ;

img3on = new Image ;    
img3off = new Image ;

img4on = new Image ;    
img4off = new Image ;

img5on = new Image ;    
img5off = new Image ;

img6on = new Image ;    
img6off = new Image ;

img7on = new Image ;    
img7off = new Image ;

img1on.src = "/Picture/button/comp_2.jpg";    
img1off.src = "/Picture/button/comp_1.jpg";

img2on.src = "/Picture/button/service_2.jpg";    
img2off.src = "/Picture/button/service_1.jpg";

img3on.src = "/Picture/button/production_2.jpg";    
img3off.src = "/Picture/button/production_1.jpg";

img4on.src = "/Picture/button/water_2.jpg";    
img4off.src = "/Picture/button/water_1.jpg";

img5on.src = "/Picture/button/price_2.jpg";    
img5off.src = "/Picture/button/price_1.jpg";

img6on.src = "/Picture/button/order_2.jpg";    
img6off.src = "/Picture/button/order_1.jpg";

img7on.src = "/Picture/button/cont_2.jpg";
img7off.src = "/Picture/button/cont_1.jpg";

}

function img_act(imgName) {
if (document.images)
{ imgOn = eval (imgName + "on.src");
document [imgName].src = imgOn; } }

function img_inact(imgName) {
if (document.images)
{ imgOff = eval(imgName + "off.src");
document [imgName].src = imgOff; } }