function upEffect(cur) {
	if (document.getElementById)
		cur.className='mainButtonUp' ;
	}

function normalEffect(cur){
	if (document.getElementById)
		cur.className='mainButton' ;
	}
	
function upEffectSub(cur) {
	if (document.getElementById)
		cur.className='subButtonUp' ;
	}

function normalEffectSub(cur){
	if (document.getElementById)
		cur.className='subButton' ;
	}