function click_picture(id, link) {

	var idcourant = 'img_'+id;

	var name = document.getElementById(idcourant).name;
	var srcCible = document.getElementById('img_princ').src;
	srcCible = srcCible.substring(0,srcCible.lastIndexOf('/'));
	var src =  srcCible+"/"+id+"_mindg_"+name;
	document.getElementById('img_princ').src = src;
	
	document.getElementById('lien_img_princ').href= link;
}