function show_smenu(num,pos){
	document.getElementById('menu'+num).style.background='transparent url(images/map-gauche.jpg) '+pos+'px left no-repeat';
}
function hide_smenu(num){
	document.getElementById('menu'+num).style.background='none';
}

function show_smenu1(num,pos){
	document.getElementById('menu'+num).style.background='transparent url(images/menu.jpg) '+pos+'px left no-repeat';
}
function hide_smenu1(num){
	document.getElementById('menu'+num).style.background='none';
}