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 ; 
img8on = new Image ;
img8off = new Image ; 


img1on.src = "images/about2.gif" ;
img1off.src = "images/about1.gif"; 
img2on.src = "images/photos2.gif" ;
img2off.src = "images/photos1.gif" ;
img3on.src = "images/videos2.gif" ;
img3off.src = "images/videos1.gif"; 
img4on.src = "images/cont2.gif" ;
img4off.src = "images/cont1.gif"; 
img5on.src = "images/about4.gif" ;
img5off.src = "images/about3.gif"; 
img6on.src = "images/photos4.gif" ;
img6off.src = "images/photos3.gif";
img7on.src = "images/videos4.gif" ;
img7off.src = "images/videos3.gif";
img8on.src = "images/cont4.gif" ;
img8off.src = "images/cont3.gif";


}

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;
 }
}