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 = "images/buttons/button1_1.jpg";
img1off.src = "images/buttons/button1.jpg";
img2on.src = "images/buttons/button2_1.jpg";
img2off.src = "images/buttons/button2.jpg";
img3on.src = "images/buttons/button3_1.jpg";
img3off.src = "images/buttons/button3.jpg";
img4on.src = "images/buttons/button4_1.jpg";
img4off.src = "images/buttons/button4.jpg";
img5on.src = "images/zakladki/features_2.jpg";
img5off.src = "images/zakladki/features.jpg";
img6on.src = "images/zakladki/specifications_2.jpg";
img6off.src = "images/zakladki/specifications.jpg";
img7on.src = "images/zakladki/fotos_2.jpg";
img7off.src = "images/zakladki/fotos.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;
 }
}
function show(obj) {if (document.getElementById(obj).style.display == 'none') document.getElementById(obj).style.display = 'block';else document.getElementById(obj).style.display = 'none';}