//レイヤ表示
function dispLayer(){
	var targetName = document.getElementById('prebox');
	
	targetName.style.left = targetName.clientWidth + "px";
	targetName.style.visibility = 'visible';
}

//レイヤ非表示
function menuhidden(){
	var targetName = document.getElementById('prebox');

	targetName.style.visibility = 'hidden';
}