//this opens and closes the menu sections when the page loads
function menu_define(menu_id){
	if($(menu_id)){	//the home page doesn't show the main menu		
	//to open the nested submenus
	if($(menu_id).down('.level2') != undefined){
		$(menu_id).down('.level2').removeClassName('hide');
		$(menu_id).down('.level2').addClassName('show');
	}
	if($(menu_id).down('.level3') != undefined){
		$(menu_id).down('.level3').removeClassName('hide');
		$(menu_id).down('.level3').addClassName('show');
	}				

//to open the parent menus
	if($(menu_id).up('.level2') != undefined){
	$(menu_id).up('.level2').removeClassName('hide');
	$(menu_id).up('.level2').addClassName('show');
	}
	if($(menu_id).up('.level3') != undefined){
	$(menu_id).up('.level3').removeClassName('hide');
	$(menu_id).up('.level3').addClassName('show');
	}	
	
	}
}