function showSubMenu(menu){
	try{
		switch(menu){
			case'1':
				document.getElementById('sec-nav').innerHTML = menu1;
			break;
			
			case'2':
				document.getElementById('sec-nav').innerHTML = menu2;
			break;
			
			case'3':
				document.getElementById('sec-nav').innerHTML = menu3;
			break;
			
			case'4':
				document.getElementById('sec-nav').innerHTML = menu4;
			break;
		}
	}catch(e){
		
	}
}