var Mediceau = document.Mediceau || {};

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function in_array(array,elemento){
	for(var i in array){ if(array[i]==elemento) return true;}
	return false;
}


Mediceau.Navegacion = {
	frame: window.parent.frameNavegacion,
	secciones: new Array("nav_actua","nav_quienes","nav_info","nav_documentos","nav_etudes","nav_robinet","nav_salle","nav_salle_documents","nav_affiches","nav_robinet2","nav_apprendre","nav_espace"),
	
	marcar: function(cual){
		for (var i=0; i < Mediceau.Navegacion.secciones.length; i++) { 
			obj = MM_findObj(Mediceau.Navegacion.secciones[i], Mediceau.Navegacion.frame.document );
			if( in_array( cual, Mediceau.Navegacion.secciones[i] ) ){
				obj.style.display = 'block';
			}else{
				obj.style.display = 'none';
			}
		}	
	}	
}

javascript in_array object frame.
Usar:

Mediceau.Navegacion.marcar(['nav1','nav2'])
...
_--Nav 1
_--Nav 2
_--Nav 3
_--Nav 4

Javascript : Marcar Navegación (Varios Items)

javascript, object

JavaScript