// 画像変更
function changePhoto(iPos)
{
	for(i = 1; i <= 5; i++)
	{
		var elemMain		= document.getElementById("main_"		+ i);
		var elemThumbnail	= document.getElementById("thumbnail_"	+ i);
		if(!elemMain || !elemThumbnail)
		{
			break;
		}

		if(i == iPos)
		{
			elemMain.style.display		= "block";
			elemThumbnail.style.display	= "none";
		}
		else
		{
			elemMain.style.display		= "none";
			elemThumbnail.style.display	= "inline";
		}
	}
}