function hideMenu(){
				
	var cpt = 1 ;

	while( document.getElementById( "menuItem" + cpt ) != null){
		
		Element.hide('menuItem' + cpt); 

		cpt++ ;
	}
	/*
	Element.hide('bg_main_image');
	Effect.Appear('bg_main_image');
	*/
}

function loadMenuItems( index ){
	
	if( document.getElementById( "menuItem" + index ) != null ){
		
		new Effect.Appear('menuItem'  + index);
		index ++ ;
		setTimeout("loadMenuItems(" + index + ");",200) ;
	}
}

function changeMarginLeft( id, translation ){
	
	var el = document.getElementById(id) ;

	if( el != null ){

		el.style.marginLeft = translation ;
	}
}