var submenus = ['sub_avant_seine', 'sub_saison', 'sub_avec_publics', 'sub_espace_pro', 'sub_infos_pratiques'];

function showSubmenu(pSubMenuId) {
	
	for(var i = 0; i < submenus.length; i++) {
		var submenu = findObj(submenus[i]);
		
		if(i == pSubMenuId) {
			
			submenu.style.visibility = "visible";
		}else {
			
			submenu.style.visibility = "hidden";
		}
	}
}

function hideSubmenu(pSubMenu) {
	
	var submenu = findObj(submenus[pSubMenu]);
	submenu.style.visibility = "hidden";
}

function findObj(theObj, theDoc) {
	
	var p, i, foundObj;
	if(!theDoc)
		theDoc = document;
	
	if( (p = theObj.indexOf("?")) > 0 && parent.frames.length) {
		
		theDoc = parent.frames[theObj.substring(p+1)].document;
		theObj = theObj.substring(0,p);
	}
 	
	if(!(foundObj = theDoc[theObj]) && theDoc.all)
		foundObj = theDoc.all[theObj];
	
	for (i=0; !foundObj && theDoc.forms && i < theDoc.forms.length; i++) {
		foundObj = theDoc.forms[i][theObj];
	}
	
	for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
		foundObj = findObj(theObj,theDoc.layers[i].document);
	
	if(!foundObj && document.getElementById)
		foundObj = document.getElementById(theObj);

  return foundObj;
}