function afficheLayerMap(menuID) {
	 masqueLayerMap();
	 elementID = "LayerMap" + menuID;
    if (document.getElementById(elementID)) {
     if ((getIdProperty( elementID, "display" )) == "block"){
			setIdProperty( elementID, "display", "none" );
	   } else {
			setIdProperty( elementID, "display", "block" );return false;
	   }
	   
    }
    //$('#LayerMap'+ menuID).show();
   
}

function masqueLayerMap(){
    
    var maxItems = 80;
    for (i=1; i<=maxItems; i++) {
    	//$('#LayerMap'+ i).hide();
      	mElementID = "LayerMap" + i;
      	if (document.getElementById(mElementID)) { setIdProperty( mElementID, "display", "none" ); }
    }

}