function ShowMaterialPicture(id)
{
	var win = open("img/big/" + id + ".jpg", id + "_big",
		"height = 370,"
		+ "width = 370,"
		+ "resizable = no,"
		+ "scrollbars = no,"
		+ "status = no,"
		+ "titlebar = no,"
		+ "toolbar = no,"
		+ "location = no,"
		+ "menubar = no,"
		,false)
	win.opener = window;
	win.focus();
	return true;
}

function ShowBigPicture(id)
{
	var win = open("img/big/" + id + ".jpg", id + "_big",
		"height = 470,"
		+ "width = 620,"
		+ "resizable = yes,"
		+ "scrollbars = no,"
		+ "status = no,"
		+ "titlebar = no,"
		+ "toolbar = no,"
		+ "location = no,"
		+ "menubar = no,"
		,false)
	win.opener = window;
	win.focus();
	return true;
}