function swapMenu(menu)
{
	var RegExp;
	var result;
	
	RegExp = /(.*)_(.*)\.(.*)/;
	result = RegExp.exec(menu.src);
	
	if(result[2] == "off")
	{
		menu.src = result[1] + "_on." + result[3];
	}
	else
	{
		menu.src = result[1] + "_off." + result[3];
	}
}