function preload_image(_image) {
	var image = new Image;
	image.src = _image;
}

/* 
 * Changement comportement Rollover carte 
 */
function change_image(region) {
	var ShowItem = document.getElementById("area_image");
	var LinkItem = document.getElementById("county_" + region);
	ShowItem.style.backgroundImage = 'url(fichiers-map/regions/map_' + region + '.gif)';
	LinkItem.style.color = "#609000";
	return true;
}

/* 
 * Retour etat 1 carte
 */ 
function hide_image(region) {
	var ShowItem = document.getElementById("area_image");
	var LinkItem = document.getElementById("county_" + region);
	ShowItem.style.backgroundImage = 'url(img/none.gif)';
	LinkItem.style.color = "black";	
	return true;
}