function unwrapping(wrap)
	{
		if (document.layers)
			{
			showsub = (document.layers[wrap].visibility == 'hide') ? 'show' : 'hide'
			document.layers[wrap].visibility = showsub;
			}
		else if (document.all)
			{
			showsub = (document.all[wrap].style.visibility == 'hidden') ? 'visible'	: 'hidden';
			document.all[wrap].style.visibility = showsub;
			}
		else if (document.getElementById)
			{
			showsub = (document.getElementById(wrap).style.visibility == 'hidden') ? 'visible' : 'hidden';
			document.getElementById(wrap).style.visibility = showsub;
			}
	}

function wrapping(wrap)
	{
		if (document.layers)
			{
			current = (document.layers[wrap].display == 'none') ? 'block' : 'none';
			document.layers[wrap].display = current;
			}
		else if (document.all)
			{
			current = (document.all[wrap].style.display == 'none') ? 'block' : 'none';
			document.all[wrap].style.display = current;
			}
		else if (document.getElementById)
			{
			showsub = (document.getElementById(wrap).style.display == 'none') ? 'block' : 'none';
			document.getElementById(wrap).style.display = showsub;
			}
	}

function show(wrap)
	{
		if (document.layers)
			{
			for (var i=1;i<5;i++) { //メニューを増やした数だけ i<5 の部分の数字を足す
			document.layers['sub' + i].display = 'none';
						}
			document.layers[wrap].display = 'block';
			}
		else if (document.all)
			{
			for (var i=1;i<5;i++) { //メニューを増やした数だけ i<5 の部分の数字を足す
			document.all['sub' + i].style.display = 'none';
						}
			document.all[wrap].style.display = 'block';
			}
		else if (document.getElementById)
			{
			for (var i=1;i<5;i++) { //メニューを増やした数だけ i<5 の部分の数字を足す
			document.getElementById('sub' + i).style.display = 'none';
						}
			document.getElementById(wrap).style.display = 'block';
			}
	}