var imageName;


if (document.images)
{
  home				= new Image(57,23); home.src = "images/home.gif";
  home_high			= new Image(72,38); home_high.src = "images/home_high.gif";  
  
  downloads 			= new Image(121,23); downloads.src = "images/downloads.gif";  
  downloads_high 		= new Image(136,38); downloads_high.src = "images/downloads_high.gif";  
  
  donations 			= new Image(109,23); donations.src = "images/donations.gif";  
  donations_high 		= new Image(123,38); donations_high.src = "images/donations_high.gif";  
 
  store 			= new Image(63,23); store.src = "images/store.gif";  
  store_high 			= new Image(73,38); store_high.src = "images/store_high.gif";  
  
  about 			= new Image(67,23); about.src = "images/about.gif";  
  about_high			= new Image(81,38); about_high.src = "images/about_high.gif";  
}


function highImg( imageName ) {
  if ( document.images ) {
    document[ imageName ].src = eval(imageName + "_high.src");
  }
}

function offImg( imageName ) {
  if ( document.images ) {
    document[ imageName ].src = eval(imageName + ".src");
  }
}