function preload(imgObj,imgSrc) 
{
   eval(imgObj+' = new Image()')
   eval(imgObj+'.src = "'+imgSrc+'"')
}

preload('home_on','/images/home_on.gif');
preload('home_off','/images/home_off.gif');

preload('about_on','/images/about_on.gif');
preload('about_off','/images/about_off.gif');

preload('media_on','/images/media_on.gif');
preload('media_off','/images/media_off.gif');

preload('publications_on','/images/publications_on.gif');
preload('publications_off','/images/publications_off.gif');

preload('search_on','/images/search_on.gif');
preload('search_off','/images/search_off.gif');

preload('francais_on','/images/francais_on.gif');
preload('francais_off','/images/francais_off.gif');

preload('fiscal_on','/images/fiscal_on.gif');
preload('fiscal_off','/images/fiscal_off.gif');

preload('innovation_on','/images/innovation_on.gif');
preload('innovation_off','/images/innovation_off.gif');

preload('human_on','/images/human_on.gif');
preload('human_off','/images/human_off.gif');

preload('creating_on','/images/creating_on.gif');
preload('creating_off','/images/creating_off.gif');

preload('corporate_on','/images/corporate_on.gif');
preload('corporate_off','/images/corporate_off.gif');

preload('north_on','/images/north_on.gif');
preload('north_off','/images/north_off.gif');

preload('canada_on','/images/canada_on.gif');
preload('canada_off','/images/canada_off.gif');

preload('more_on','/images/more_on.gif');
preload('more_off','/images/more_off.gif');

preload('choose_on','/images/choose_on.gif');
preload('choose_off','/images/choose_off.gif');

function img_toggle( imgName, mode ) 
{
   if( document.images ) 
   {
      document[ imgName ].src = eval( imgName + "_" + mode + ".src" );
   }
}