// on images -------------------------------------

small_on = new Image;
small_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/small_on.jpg" 

medium_on = new Image;
medium_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/medium_on.jpg" 

large_on = new Image;
large_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/large_on.jpg" 

hd_480p_on = new Image;
hd_480p_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/480p_on.jpg" 

hd_720p_on = new Image;
hd_720p_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/720p_on.jpg" 

hd_1080p_on = new Image;
hd_1080p_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/1080p_on.jpg" 

ipod_on = new Image;
ipod_on.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/ipod_on.jpg" 

// off images ------------------------------------

small_off = new Image;
small_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/small_off.jpg" 

medium_off = new Image;
medium_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/medium_off.jpg" 

large_off = new Image;
large_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/large_off.jpg" 

hd_480p_off = new Image;
hd_480p_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/480p_off.jpg" 

hd_720p_off = new Image;
hd_720p_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/720p_off.jpg" 

hd_1080p_off = new Image;
hd_1080p_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/1080p_off.jpg"

ipod_off = new Image;
ipod_off.src = "http://movies.apple.com/trailers/lions_gate/thedescent/images/ipod_off.jpg" 

function button_on ( imgName )
{

   iName = imgName;
   butOn = eval ( imgName + "_on.src" );
   document [imgName].src = butOn;
}

function button_off ( imgName )
{


   butOff = eval ( imgName + "_off.src" );
   document [imgName].src = butOff;
}