function showhide(divID) {
elemS = document.getElementById(divID).style;
Folder = document.getElementById('d_'+divID).style;
if(elemS.display=='none') {
	elemS.display='block';
	Folder.backgroundImage = 'url(../_i/dossierM.png)';

}
else if(elemS.display=='block') {
	elemS.display='none';
	Folder.backgroundImage = 'url(../_i/dossier.png)';

}
}