var sub_main_menu,sub_main_menu_button,sub_main_menu_over = false;

function initShowHideMenu(){
	if(document.getElementById('sub_main_menu')){
		sub_main_menu = document.getElementById('sub_main_menu');
	}
	if(document.getElementById('sub_main_menu_button')){
		sub_main_menu_button = document.getElementById('sub_main_menu_button');
	}
}

function showMenu(){
	sub_main_menu_button.style.display = 'none';
	sub_main_menu.style.display = '';
}

function addHideEvent(){
	//sub_main_menu.onmouseout = function(){ hideMenu(); };
}

function hideMenu(){
	sub_main_menu_over = false;
	setTimeout('doHideMenu()',100);
}

function doHideMenu(){
	if(!sub_main_menu_over){
		sub_main_menu_button.style.display = '';
		sub_main_menu.style.display = 'none';
		//sub_main_menu.onmouseout = null;
		sub_main_menu_over = false;
	}
}


addEvent(window, 'load', initShowHideMenu, false);