var subMenu=null;
var mMenu=null;
var active=null;
function mLoad(){
	subMenu=[document.getElementById('sub_menu1'),document.getElementById('sub_menu2')]
	mMenu=[document.getElementById('mm1'),document.getElementById('mm4')]
	if(mMenu[0].className=='active')
		active=0;
	if(mMenu[1].className=='active')
		active=1;
}
function showHide(i){
	if(!subMenu)mLoad()

	if(subMenu[i].style.display=='block'){
		subMenu[i].style.display='none'
		mMenu[i].className=''
		subMenu[active].style.display='block'
	}
	else{
		subMenu[i].style.display='block'
		mMenu[i].className='active'
		subMenu[active].style.display='none'
	}			
}