function preload(lang)
	{
		if(document.images)
		{
		  var image_array = new Array();
			
		  // path to the directory with images
		  var path = 'images/';
		
		  // enumeration of the "active" images
		  image_array[0] = path + "btn_presentation.jpg";
		  image_array[1] = path + "btn_race.jpg";
		  image_array[2] = path + "btn_charcuterie.jpg";
		  image_array[3] = path + "btn_viande.jpg";
		  image_array[4] = path + "btn_recettes.jpg";
		
		  var preload_image = new Array ();
		 
		  for(var i=0; i<image_array.length; i++)
		  {
			preload_image[i]= new Image();
			preload_image[i].src = image_array[i];
		  }
		}
	}