// change image
function changeImage(region) {
	var ShowItem = document.getElementById("area_image");
	ShowItem.style.backgroundImage = 'url(./image/map/carte_chloro'+region+'.png)';
	hideBlocTxt();
	affichDiv("bloc"+region);
	return true;
}

// reaffiche la map d'origine
function hideImage(region) {
	var ShowItem = document.getElementById("area_image");
	ShowItem.style.backgroundImage = 'url(./image/map/carte_chloro.png)';
	hideBlocTxt();
	return true;
}

// cache les bloc txt
function hideBlocTxt() {
	cachDiv("bloc1");
	cachDiv("bloc2");
	cachDiv("bloc3");
	cachDiv("bloc4");
	cachDiv("bloc5");
	return true;
}